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 A140862 #6 Aug 22 2019 04:36:54 %S A140862 1,2,5,6,2,8,10,13,14,22,30,33,37,41,42,46,48,57,58,61,65,66,69,70,73, %T A140862 78 %N A140862 Incorrect duplicate of A081083. %K A140862 dead %O A140862 1,2 %A A140862 _Giovanni Teofilatto_, Jul 19 2008