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 A190692 #4 Mar 30 2012 18:57:28 %S A190692 4,8,15,19,30,34,45,49,56,60,64,71,75,86,90,101,105,112,116,120,127, %T A190692 131,142,146,157,161,168,172,183,187,198,202,209,213,217,224,228,239, %U A190692 243,254,258,265,269,273,280,284,295,299,310,314,321,325,336,340,351,355,366,370,377,381,392,396,407,411,418,422,426,433,437,448 %N A190692 Positions of 3 in A190688. %C A190692 See A190688. %t A190692 (See A190688.) %Y A190692 Cf. A190688. %K A190692 nonn %O A190692 1,1 %A A190692 _Clark Kimberling_, May 17 2011