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 A030374 #4 Mar 30 2012 18:56:18 %S A030374 5,13,21,29,30,32,35,38,42,54,66,77,78,80,83,86,90,102,114,125,126, %T A030374 128,131,134,138,150,162,173,174,175,177,178,181,182,185,186,189,191, %U A030374 193,197,201,205,207,209,213,217,221,223,225,229 %N A030374 Position of n-th 0 in A030373. %K A030374 nonn %O A030374 1,1 %A A030374 _Clark Kimberling_