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 A131861 #2 Mar 30 2012 18:50:58 %S A131861 1,3,9,11,16,17,18,19,21,23,24,25,26,27,29,31,33,35,41,43,48,49,50,51, %T A131861 53,55,56,57,58,59,61,63,81,83,89,91,113,115,121,123,129,131,137,139, %U A131861 144,145,146,147,149,151,152,153,154,155,157,159,161,163,169,171,176 %N A131861 Numbers m such that A131851(m) > 0. %Y A131861 Cf. A131862, A131854, A131859, A131863. %K A131861 nonn %O A131861 1,2 %A A131861 _Reinhard Zumkeller_, Jul 22 2007