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 A293786 #12 Oct 17 2017 05:19:53
%S A293786 1,1,5,79,3049,281781,62813281,31485039139,34744132717841,
%T A293786 87021427208179753,478223788295847736801,5632387976229387238588911,
%U A293786 146556226850373293041283537497,8264489999577847335581419448796253,987463694910250882031042208037752864641
%N A293786 a(n) = n! * [x^n] exp(Sum_{j>=1} j^(n-1)*x^j).
%H A293786 Vaclav Kotesovec, <a href="/A293786/b293786.txt">Table of n, a(n) for n = 0..76</a>
%F A293786 log(a(n)) ~ exp(-1) * n^2. - _Vaclav Kotesovec_, Oct 17 2017
%t A293786 Table[n!*SeriesCoefficient[Exp[Sum[j^(n-1)*x^j, {j, 1, n}]], {x, 0, n}], {n, 0, 20}] (* _Vaclav Kotesovec_, Oct 17 2017 *)
%Y A293786 Main diagonal of A293785.
%K A293786 nonn
%O A293786 0,3
%A A293786 _Seiichi Manyama_, Oct 16 2017