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 A262263 #48 Mar 20 2018 14:07:36 %S A262263 1,1,1,2,3,5,8,6,7,13,10,13,11,12,23,20,12,16,28,25,14,19,33,29,15,20, %T A262263 35,28,8,8,16,24,40,31,38,34,37,34,34,68,62,49,28,35,63,53,25,32,57, %U A262263 40,48,88,84,67,44,57,45,46,91,78,50,68,56,62 %N A262263 Duplicate of A072987. %Y A262263 Duplicate of A072987. %K A262263 dead %O A262263 1,4