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A294494
E.g.f.: 1/Product_{k>0} (1+x^k/k!)^k.
2
1, -1, 0, -3, 26, -75, 324, -3535, 30988, -242025, 2245820, -26847381, 339741984, -4205748547, 57094691822, -883946426805, 14358210544304, -239959114870689, 4286519116236900, -82194727064059645, 1650577120959962440, -34495065863164195611
OFFSET
0,4
LINKS
MATHEMATICA
With[{nn=30}, CoefficientList[Series[1/Product[(1+x^k/k!)^k, {k, nn}], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, May 12 2018 *)
PROG
(PARI) N=66; x='x+O('x^N); Vec(serlaplace(1/prod(k=1, N, (1+x^k/k!)^k)))
CROSSREFS
KEYWORD
sign
AUTHOR
Seiichi Manyama, Nov 01 2017
STATUS
approved