mscroggs.co.uk
mscroggs.co.uk

subscribe

Comment

Comments

Comments in green were written by me. Comments in blue were not written by me.
Wow. Just discovered I meisread 15th Dec puzzle.

I can tell you that the number of combinations of n As and Bs which contain at at least one uninterrupted sequence of 3 As is 2^n - F3(n+3) where F3 is the fibonaccia variant adding 3 numbers (1,1,2,4,7,13,24 etc.).
Only took me about 8 hours (with some small help form OEIS for the 2 As problem)
Neal (@zbvif)
on /blog/46
               

Archive

Show me a random blog post
 2020 

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 ▼
 2018 
▼ show ▼
 2017 
▼ show ▼
 2016 
▼ show ▼
 2015 
▼ show ▼
 2014 
▼ show ▼
 2013 
▼ show ▼
 2012 
▼ show ▼

Tags

hexapawn plastic ratio go finite element method gaussian elimination matrix multiplication weak imposition tennis python geometry data latex draughts sport boundary element methods golden ratio polynomials rugby determinants christmas graph theory reuleaux polygons matrix of cofactors programming reddit chebyshev books noughts and crosses simultaneous equations bubble bobble estimation london cross stitch palindromes misleading statistics preconditioning craft electromagnetic field wool nine men's morris twitter trigonometry advent calendar raspberry pi world cup signorini conditions a gamut of games map projections matt parker countdown game of life sobolev spaces chess matrices menace dataset golden spiral harriss spiral ternary the aperiodical stickers rhombicuboctahedron platonic solids folding paper game show probability big internet math-off php bodmas matrix of minors final fantasy inverse matrices manchester frobel hats light propositional calculus european cup puzzles inline code approximation triangles london underground logs bempp talking maths in public national lottery data visualisation accuracy binary coins games tmip pizza cutting error bars gerry anderson royal institution mathsteroids flexagons people maths football statistics folding tube maps curvature exponential growth probability hannah fry logic numerical analysis interpolation news graphs wave scattering dates video games mathslogicbot ucl radio 4 oeis javascript martin gardner machine learning phd asteroids realhats fractals manchester science festival speed royal baby pythagoras pac-man arithmetic computational complexity cambridge chalkdust magazine christmas card mathsjam dragon curves braiding convergence weather station captain scarlet sorting sound

Archive

Show me a random blog post
▼ show ▼
© Matthew Scroggs 2012–2020