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 A130447 #6 Oct 03 2013 09:38:18 %S A130447 1,32,60,91,121,152,182,213,244,274,305,335 %N A130447 Numbering the days of a 365-day year from 1 (Jan 01) to 365 (Dec 31), these are the days that start months. %C A130447 a(n) = 366 - A073304(n+1), for i=0 to 11. - _Michel Marcus_, Jun 14 2013 %e A130447 213 is in the sequence because the 213th day is August 1. %K A130447 fini,full,nonn %O A130447 1,2 %A A130447 _J. Lowell_, Aug 07 2007