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 A247059 #10 Jan 25 2019 08:31:12 %S A247059 1,1,3,19,73,1281,3136,169681,844929,22607353,169431706 %N A247059 Number of endofunctions on [n] that are the n-th power of an endofunction. %e A247059 a(3) = 19: (1,1,1), (1,1,3), (1,2,1), (1,2,2), (1,2,3), (1,3,2), (1,3,3), (2,1,1), (2,1,2), (2,1,3), (2,2,2), (2,2,3), (2,3,2), (3,1,1), (3,2,1), (3,2,3), (3,3,1), (3,3,2), (3,3,3). %Y A247059 Main diagonal of A247026. %K A247059 nonn,more %O A247059 0,3 %A A247059 _Alois P. Heinz_, Sep 10 2014 %E A247059 a(8)-a(10) from _Bert Dobbelaere_, Jan 25 2019