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 A247054 #10 Jan 24 2019 15:46:07 %S A247054 1,1,4,21,148,1305,13806,169681,2357560,36407241,621268930 %N A247054 Number of endofunctions on [n] that are the 7th power of an endofunction. %Y A247054 Column k=7 of A247026. %K A247054 nonn,more %O A247054 0,3 %A A247054 _Alois P. Heinz_, Sep 10 2014 %E A247054 a(8)-a(10) from _Bert Dobbelaere_, Jan 24 2019