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 A061059 #22 Apr 04 2019 23:50:00 %S A061059 2,3,6,15,55,182,715,3135,15015,81345,448630,2733549 %N A061059 Duplicate of A060796. %K A061059 dead %O A061059 1,1