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 A076501 #20 Apr 08 2025 21:55:53 %S A076501 2,5,13,31,73,173,409,967,3450844193,39661481813,2076849234433, %T A076501 52134281654579,14838980942616539,260230524377962793, %U A076501 4563650703502319197,80032531899785490253,172111744128569095516889 %N A076501 Erroneous version of A086758. %K A076501 dead %O A076501 1,1 %A A076501 _David Terr_, Nov 08 2002