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 A058154 #9 Jul 15 2021 18:58:26 %S A058154 1,2,11,156,4122,208672,18507440,7892741602 %N A058154 Number of labeled monoids of order n with a fixed identity. %H A058154 <a href="/index/Mo#monoids">Index entries for sequences related to monoids</a> %Y A058154 a(n) = A058153(n)/n. %K A058154 nonn,hard,more %O A058154 1,2 %A A058154 _Christian G. Bower_, Nov 14 2000 %E A058154 a(8) from _Christian G. Bower_, Dec 28 2006