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 A371552 #5 Mar 30 2024 02:33:44
%S A371552 1,-3,3,18,-57,-138,246,4281,13383,-156906,-450822,-957729,23375886,
%T A371552 289894875,-179027895,-3403581357,-174968380137,-419588974650,
%U A371552 4439383168602,50400469832883,1027067921064738,428364930324489,-18456487538087145,-1019962180000311267
%N A371552 Expansion of e.g.f. Product_{k>=1} (1 - x^k/k!)^3.
%t A371552 nmax = 23; CoefficientList[Series[Product[(1 - x^k/k!)^3, {k, 1, nmax}], {x, 0, nmax}], x] Range[0, nmax]!
%Y A371552 Cf. A010816, A032314, A185895, A371551.
%K A371552 sign
%O A371552 0,2
%A A371552 _Ilya Gutkovskiy_, Mar 27 2024