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 A075042 #3 May 11 2007 03:00:00 %S A075042 1,2,2,2,54,91,141,141,44360,48919,218972,526095,526095,526095 %N A075042 Duplicate of A045983. %K A075042 dead %O A075042 1,2