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 A294045 #11 Aug 30 2025 11:22:53
%S A294045 1,1,6,87,2248,88245,4834296,349799527,32139501696,3640751250057,
%T A294045 496985319186400,80270368530689271,15112076463651285504,
%U A294045 3275115726792062534173,808478403184433649483648,225271606246507403888070375,70294100400932212703515672576
%N A294045 a(n) = n! * [x^n] exp((1+x)^n - 1).
%H A294045 Seiichi Manyama, <a href="/A294045/b294045.txt">Table of n, a(n) for n = 0..258</a>
%t A294045 Table[n!*SeriesCoefficient[E^((1+x)^n - 1),{x,0,n}], {n,0,20}] (* _Vaclav Kotesovec_, Aug 30 2025 *)
%Y A294045 Main diagonal of A294042.
%Y A294045 Cf. A294043.
%K A294045 nonn,changed
%O A294045 0,3
%A A294045 _Seiichi Manyama_, Oct 22 2017