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 A065438 #2 Oct 03 2013 09:37:42 %S A065438 10,21,32,43,54,65,76,87,98,109,110,121,132,143,154,165,176,187,198, %T A065438 209,220,221,232,243,254,265,276,287,298,309,320,331,332,343,354,365, %U A065438 376,387,398,409,420,431,442,443,454,465,476,487,498,509,520,531,542 %N A065438 Complement of A065039. %K A065438 nonn %O A065438 1,1 %A A065438 _Santi Spadaro_, Nov 17 2001