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 A077084 #7 May 05 2025 00:47:06 %S A077084 1,2,6,10,20,22,46,48,58,82,106,166,178,180,208,226,262,346,358,382, %T A077084 466,478,502,864,1120,3552 %N A077084 Erroneous version of A097646. %K A077084 nonn,dead %O A077084 1,2 %A A077084 _Labos Elemer_, Oct 28 2002