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 A040176 #7 Sep 22 2004 03:00:00 %S A040176 1,3,5,11,17,41,83,137,257,641,1097,2329,4369,10537,17477,35209,65537 %N A040176 Apart from initial terms, same as A007755, which is a better version. %K A040176 dead %O A040176 1,2