This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A082586 #6 Mar 30 2012 17:36:40 %S A082586 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1, %T A082586 2,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1, %U A082586 1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1 %N A082586 Length of the run of consecutive equal digits in the decimal expansion of Pi beginning at position n and ignoring any immediately-previous equal digits. %C A082586 Digits 3,1,4,... are indexed 1,2,3,... %e A082586 Pi = 3.141592653589793238462643383279502884... and the first run of 2 starts at position 25, so a(n) = 1 for n < 25, a(25) = 2. %e A082586 Runs of length 2 begin in positions 25,35,45,60,80,95 then not again until 118. Compare A049514 and A049518. %Y A082586 Cf. A084073, A121657 (another version). %K A082586 nonn,base,easy %O A082586 1,25 %A A082586 _N. J. A. Sloane_, May 12 2003 %E A082586 More terms from Kyle Hoffman (khoffma1(AT)ashland.edu), Apr 01 2004 %E A082586 Definition clarified by _Rick L. Shepherd_, Aug 26 2006