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 A190461 #4 Mar 30 2012 18:57:28 %S A190461 1,6,9,14,19,22,27,30,32,35,40,43,48,53,56,61,64,69,74,77,82,87,90,95, %T A190461 98,103,108,111,116,119,121,124,129,132,137,142,145,150,153,158,163, %U A190461 166,171,174,176,179,184,187,192,197,200,205,208,213,218,221,226,231,234,239,242,247,252,255,260,263,265,268,273,276,281,286 %N A190461 Positions of 3 in A190457. %C A190461 See A190457. %t A190461 (See A190457.) %Y A190461 Cf. A190457. %K A190461 nonn %O A190461 1,2 %A A190461 _Clark Kimberling_, May 10 2011