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 A102043 #3 May 11 2007 03:00:00 %S A102043 4,6,12,30,124,122,418,98,220,346,308,1274,1144,962,556,2512,3526,1382 %N A102043 Duplicate of A025017. %K A102043 dead %O A102043 1,1