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A157504
(det(I - M) - 1)/x where M_jk = (j*x)^k/k!.
0
-1, -2, -7, -40, -301, -2856, -32299, -416816, -5892345, -86464000, -1177909711, -8944121088, 349846341467, 29237270702080, 1585383533246925, 78578098584541184, 3843296406581515919, 190784066705549623296
OFFSET
1,2
FORMULA
E.g.f.: (det(I - M) - 1)/x where M_jk = (j*x)^k/k!.
a(n) = A157503(n)/n.
CROSSREFS
Cf. A157503.
Sequence in context: A069732 A346964 A277565 * A093985 A308876 A361597
KEYWORD
easy,sign
AUTHOR
Andrew J. Robbins, Mar 02 2009
STATUS
approved