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A371552
Expansion of e.g.f. Product_{k>=1} (1 - x^k/k!)^3.
1
1, -3, 3, 18, -57, -138, 246, 4281, 13383, -156906, -450822, -957729, 23375886, 289894875, -179027895, -3403581357, -174968380137, -419588974650, 4439383168602, 50400469832883, 1027067921064738, 428364930324489, -18456487538087145, -1019962180000311267
OFFSET
0,2
MATHEMATICA
nmax = 23; CoefficientList[Series[Product[(1 - x^k/k!)^3, {k, 1, nmax}], {x, 0, nmax}], x] Range[0, nmax]!
CROSSREFS
KEYWORD
sign
AUTHOR
Ilya Gutkovskiy, Mar 27 2024
STATUS
approved