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A114039
Expansion of g.f. 1/Sum_{k>=0} k!*(k!+1)*x^k/2.
0
1, -1, -2, -16, -257, -6613, -243980, -12155224, -786429623, -64166829085, -6449457120962, -783277824629140, -113105715390915929, -19155829563735891169, -3760880464339217383124, -847344181950467763488740, -217159542960607254804746279, -62816327344923649504400271697
OFFSET
0,3
MATHEMATICA
nmax=17; CoefficientList[Series[1/Sum[k!*(k!+1)*x^k/2, {k, 0, nmax}], {x, 0, nmax}], x] (* Stefano Spezia, Oct 09 2023 *)
CROSSREFS
Cf. A113871.
Sequence in context: A090727 A108242 A140307 * A090305 A358145 A246739
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Feb 01 2006
STATUS
approved