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2020-01-02
It's interesting that the three puzzles with the most incorrect attempts can all be looked up on OEIS.
Day 15 -
https://oeis.org/A001055
- "number of ways of factoring n with all factors greater than 1"
Day 4 -
https://oeis.org/A001045
- "number of ways to tile a 2 × (n-1) rectangle with 1 × 2 dominoes and 2 × 2 squares"
Day 2 -
https://oeis.org/A002623
- "number of nondegenerate triangles that can be made from rods of length 1,2,3,4,...,n"
Adam Abrams
on
/blog/72
×1
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PhD thesis, chapter ∞
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Proving a conjecture
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Harriss and other spirals
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Christmas cross stitch
MENACE in fiction
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Christmas (2018) is coming!
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Runge's Phenomenon
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World Cup stickers 2018, pt. 3
Mathsteroids
Jun 2018
World Cup stickers 2018, pt. 2
May 2018
A bad Puzzle for Today
Apr 2018
Building MENACEs for other games
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A 20,000-to-1 baby?
World Cup stickers 2018
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Origins of World War I
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Christmas card 2017
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Christmas (2017) is coming!
MENACE at Manchester Science Festival
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Big Ben Strikes Again
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Dragon curves II
Feb 2017
The importance of estimation error
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Is MEDUSA the new BODMAS?
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Video game surfaces
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Christmas (2016) is coming!
Oct 2016
Logical contradictions
Palindromic dates
Sep 2016
Tube map kaleidocycles
Jul 2016
Solving the cross diagonal cover problem
Jun 2016
Braiding, pt. 2
Braiding, pt. 1
Making names in Life
May 2016
Euro 2016 stickers
Mar 2016
Proving Pythagoras' theorem
Dragon curves
The
Mathematical Games
of Martin Gardner
Jan 2016
Christmas (2015) is over
2015
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Nov 2015
Christmas (2015) is coming!
Oct 2015
How to kick a conversion
How much will I win on the new National Lottery?
Aug 2015
How OEISbot works
MENACE
Mar 2015
Optimal Pac-Man
Tube map stellated rhombicuboctahedron
Logic bot, pt. 2
Design your own flexagon
Jan 2015
Tube map Platonic solids, pt. 3
2014
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Nov 2014
Logic bot
Sep 2014
Electromagnetic Field talk
Jun 2014
Tennis maths
May 2014
World Cup stickers
Apr 2014
Countdown probability, pt. 2
Countdown probability
Mar 2014
New machine unfriendly £1 coin, pt. 2
New machine unfriendly £1 coin
2013
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▲ hide ▲
Dec 2013
Assorted christmaths
Pointless probability
Jul 2013
"Uncanny" royal coincidence
Raspberry Pi weather station
2012
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▲ hide ▲
Nov 2012
Tube map Platonic solids, pt. 2
Oct 2012
Tube map Platonic solids
Tags
chebyshev
go
inline code
gerry anderson
royal baby
error bars
graphs
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coins
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python
sobolev spaces
game of life
determinants
oeis
squares
cambridge
countdown
european cup
php
pizza cutting
weak imposition
london underground
christmas
programming
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logs
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tmip
royal institution
hats
news
wool
hannah fry
matrix of cofactors
christmas card
dataset
pi approximation day
mathsteroids
manchester
approximation
noughts and crosses
realhats
the aperiodical
harriss spiral
simultaneous equations
logic
mathslogicbot
convergence
national lottery
rhombicuboctahedron
reuleaux polygons
reddit
statistics
folding tube maps
pi
light
bempp
ternary
captain scarlet
numerical analysis
folding paper
matrix of minors
data visualisation
matrix multiplication
data
triangles
accuracy
puzzles
craft
draughts
bubble bobble
computational complexity
arithmetic
big internet math-off
chess
people maths
wave scattering
menace
plastic ratio
london
flexagons
boundary element methods
mathsjam
cross stitch
manchester science festival
martin gardner
raspberry pi
inverse matrices
hexapawn
frobel
misleading statistics
pythagoras
talking maths in public
stickers
a gamut of games
trigonometry
chalkdust magazine
phd
golden spiral
gaussian elimination
braiding
radio 4
dragon curves
advent calendar
football
palindromes
final fantasy
polynomials
propositional calculus
estimation
sound
electromagnetic field
curvature
platonic solids
finite element method
quadrilaterals
map projections
ucl
probability
graph theory
Archive
Show me a random blog post
▼ show ▼
▲ hide ▲
2021
Jan 2021
Christmas (2020) is over
2020
▼ show ▼
▲ hide ▲
Dec 2020
Christmas card 2020
Nov 2020
Christmas (2020) is coming!
Jul 2020
Happy τ+e-7 Approximation Day!
May 2020
A surprising fact about quadrilaterals
Interesting tautologies
Mar 2020
Log-scaled axes
Feb 2020
PhD thesis, chapter ∞
PhD thesis, chapter 5
PhD thesis, chapter 4
PhD thesis, chapter 3
Inverting a matrix
PhD thesis, chapter 2
Jan 2020
PhD thesis, chapter 1
Gaussian elimination
Matrix multiplication
Christmas (2019) is over
2019
▼ show ▼
▲ hide ▲
Dec 2019
Visualising MENACE's learning
Christmas card 2019
Nov 2019
Christmas (2019) is coming!
Sep 2019
A non-converging LaTeX document
TMiP 2019 treasure punt
Jul 2019
Big Internet Math-Off stickers 2019
Jun 2019
Proving a conjecture
Apr 2019
Harriss and other spirals
Mar 2019
realhats
Jan 2019
Christmas (2018) is over
2018
▼ show ▼
▲ hide ▲
Dec 2018
Christmas cross stitch
MENACE in fiction
Christmas card 2018
Nov 2018
Christmas (2018) is coming!
Sep 2018
Runge's Phenomenon
Jul 2018
World Cup stickers 2018, pt. 3
Mathsteroids
Jun 2018
World Cup stickers 2018, pt. 2
May 2018
A bad Puzzle for Today
Apr 2018
Building MENACEs for other games
Mar 2018
A 20,000-to-1 baby?
World Cup stickers 2018
Jan 2018
Origins of World War I
Christmas (2017) is over
2017
▼ show ▼
▲ hide ▲
Dec 2017
Christmas card 2017
Nov 2017
Christmas (2017) is coming!
MENACE at Manchester Science Festival
Jun 2017
Big Ben Strikes Again
Mar 2017
The end of coins of constant width
Dragon curves II
Feb 2017
The importance of estimation error
Jan 2017
Is MEDUSA the new BODMAS?
2016
▼ show ▼
▲ hide ▲
Dec 2016
Christmas (2016) is over
Video game surfaces
Christmas card 2016
Nov 2016
Christmas (2016) is coming!
Oct 2016
Logical contradictions
Palindromic dates
Sep 2016
Tube map kaleidocycles
Jul 2016
Solving the cross diagonal cover problem
Jun 2016
Braiding, pt. 2
Braiding, pt. 1
Making names in Life
May 2016
Euro 2016 stickers
Mar 2016
Proving Pythagoras' theorem
Dragon curves
The
Mathematical Games
of Martin Gardner
Jan 2016
Christmas (2015) is over
2015
▼ show ▼
▲ hide ▲
Nov 2015
Christmas (2015) is coming!
Oct 2015
How to kick a conversion
How much will I win on the new National Lottery?
Aug 2015
How OEISbot works
MENACE
Mar 2015
Optimal Pac-Man
Tube map stellated rhombicuboctahedron
Logic bot, pt. 2
Design your own flexagon
Jan 2015
Tube map Platonic solids, pt. 3
2014
▼ show ▼
▲ hide ▲
Nov 2014
Logic bot
Sep 2014
Electromagnetic Field talk
Jun 2014
Tennis maths
May 2014
World Cup stickers
Apr 2014
Countdown probability, pt. 2
Countdown probability
Mar 2014
New machine unfriendly £1 coin, pt. 2
New machine unfriendly £1 coin
2013
▼ show ▼
▲ hide ▲
Dec 2013
Assorted christmaths
Pointless probability
Jul 2013
"Uncanny" royal coincidence
Raspberry Pi weather station
2012
▼ show ▼
▲ hide ▲
Nov 2012
Tube map Platonic solids, pt. 2
Oct 2012
Tube map Platonic solids
Tags
christmas
chebyshev
speed
talking maths in public
preconditioning
bodmas
determinants
draughts
raspberry pi
map projections
exponential growth
dates
puzzles
statistics
craft
ucl
game show probability
matrix of minors
error bars
wool
reddit
nine men's morris
golden ratio
sobolev spaces
sport
palindromes
misleading statistics
golden spiral
dataset
binary
football
arithmetic
manchester science festival
gaussian elimination
game of life
folding paper
latex
asteroids
sorting
javascript
bubble bobble
countdown
convergence
ternary
logic
advent calendar
national lottery
pi
reuleaux polygons
hats
platonic solids
mathsjam
twitter
rugby
polynomials
simultaneous equations
squares
royal institution
inline code
coins
pythagoras
martin gardner
hannah fry
mathsteroids
machine learning
signorini conditions
boundary element methods
matrix multiplication
data visualisation
cross stitch
matrices
london underground
dragon curves
phd
final fantasy
geometry
matrix of cofactors
computational complexity
plastic ratio
oeis
sound
programming
christmas card
finite element method
video games
european cup
the aperiodical
approximation
chalkdust magazine
matt parker
realhats
people maths
rhombicuboctahedron
triangles
radio 4
london
pizza cutting
tmip
pac-man
quadrilaterals
python
probability
news
interpolation
trigonometry
data
big internet math-off
cambridge
logs
manchester
estimation
numerical analysis
curvature
weather station
accuracy
mathslogicbot
tennis
fractals
wave scattering
frobel
geogebra
weak imposition
menace
folding tube maps
books
stickers
light
noughts and crosses
hexapawn
propositional calculus
graph theory
royal baby
harriss spiral
electromagnetic field
pi approximation day
bempp
go
flexagons
chess
graphs
world cup
a gamut of games
captain scarlet
games
inverse matrices
braiding
gerry anderson
php
© Matthew Scroggs 2012–2021

2020-01-02Day 15 - https://oeis.org/A001055 - "number of ways of factoring n with all factors greater than 1"

Day 4 - https://oeis.org/A001045 - "number of ways to tile a 2 × (n-1) rectangle with 1 × 2 dominoes and 2 × 2 squares"

Day 2 - https://oeis.org/A002623 - "number of nondegenerate triangles that can be made from rods of length 1,2,3,4,...,n"

on /blog/72