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 A190715 #4 Mar 30 2012 18:57:29 %S A190715 15,30,56,71,86,112,127,142,168,183,209,224,239,265,280,295,321,336, %T A190715 377,392,418,433,448,474,489,504,530,545,586,601,627,642,657,683,698, %U A190715 713,739,754,780,795,810,836,851,866,892,907,948,963,989,1004,1019 %N A190715 Positions of 4 in A190710. %C A190715 See A190710. %t A190715 (See A190710.) %Y A190715 Cf. A190710. %K A190715 nonn %O A190715 1,1 %A A190715 _Clark Kimberling_, May 17 2011