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 A294192 #12 Oct 25 2017 02:53:13
%S A294192 1,1,28,1881,241696,50903725,15950981376,6965675824177,
%T A294192 4044321664205824,3013398202413705561,2802908316869098624000,
%U A294192 3183461016834811739809321,4335741846110695855971852288,6974958097518147761490109983781
%N A294192 a(n) = n! * [x^n] exp(n*(1/(1-x)^n- 1)).
%H A294192 Robert Israel, <a href="/A294192/b294192.txt">Table of n, a(n) for n = 0..100</a>
%p A294192 S:= series(exp(n*(1/(1-x)^n-1)),x,31):
%p A294192 seq(n!*coeff(S,x,n),n=0..30); # _Robert Israel_, Oct 24 2017
%t A294192 Table[n! SeriesCoefficient[Exp[n (1 / (1 - x)^n - 1)], {x, 0, n}], {n, 0, 20}] (* _Vincenzo Librandi_, Oct 25 2017 *)
%Y A294192 Main diagonal of A294188.
%Y A294192 Cf. A294047.
%K A294192 nonn
%O A294192 0,3
%A A294192 _Seiichi Manyama_, Oct 24 2017