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 A159959 #3 Sep 08 2013 13:31:39 %S A159959 1,3,0,2,5,4,6,7,8,10,12,14,9,11,13,15,17,19,16,21,23,18,25,20,27,22, %T A159959 29,24,26,28,31,30,32,34,33,36,38,40,42,35,44,37,39,46,41,48,50,52,43, %U A159959 45,54,56,58,60,47,62,64,66,49,51,68,53,70,72,55,57,74,76 %N A159959 Lodumo_2 of A004601 (expansion of Pi in base 2). %C A159959 Permutation of nonnegative integers . %Y A159959 Cf. A000796, A004601 %K A159959 easy,nonn %O A159959 0,2 %A A159959 _Philippe Deléham_, Apr 27 2009