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 A157041 #10 May 13 2013 01:54:10 %S A157041 3,6,7,8,12,15,16,17,19,22,25,26,27,31,34,35,36,38,39,40,42,43,44,47, %T A157041 50,53,54,55,59,62,63,64,66,69,72,73,74,78,81,82,83,85,86,87,89,90,91, %U A157041 94,95,96,98,101,104,105,106,110,113,114,115,117,120,123,124,125,129,132 %N A157041 Indices of 2's in A090822. %C A157041 Despite appearances, this is a highly irregular sequence. - _N. J. A. Sloane_ %H A157041 Charles R Greathouse IV, <a href="/A157041/b157041.txt">Table of n, a(n) for n = 1..10000</a> %K A157041 nonn %O A157041 1,1 %A A157041 _Paul Curtz_, Feb 22 2009 %E A157041 Edited by _N. J. A. Sloane_, Feb 24 2009 %E A157041 Incremented all values by 1 to match the offset in A090822. _R. J. Mathar_, Feb 24 2009