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 A075169 #2 May 01 2014 02:44:55 %S A075169 0,1,2,3,5,4,6,7,15,10,11,9,8,16,13,12,14,63,31,30,127,255,65535,21, %T A075169 20,22,23,47,18,19,17,64,32,33,128,256,65536,26,27,25,24,48,29,28,126, %U A075169 2047,4095,62,1023,511,131071,61,60,254,16383,8191,510,32767 %N A075169 Position of A014486(n) in A075170. %C A075169 See A075171. %o A075169 (define (A075169 n) (parenthesization->binruns (binexp->parenthesization (A014486 n)))) %Y A075169 Inverse of A075168. %K A075169 nonn %O A075169 0,3 %A A075169 _Antti Karttunen_, Sep 13 2002