A293300 E.g.f.: Product_{m>0} 1/(1 + x^m).

1, -1, 0, -6, 24, -120, 720, -5040, 80640, -725760, 7257600, -79833600, 1437004800, -18681062400, 261534873600, -5230697472000, 104613949440000, -1778437140480000, 32011868528640000, -729870602452992000, 17030314057236480000, -408727537373675520000

Offset

0,4

Links

Seiichi Manyama, Table of n, a(n) for n = 0..446

Formula

a(n) = n! * A081362(n).

Prog

(PARI) nn = 30; x = 'x + O('x^nn); Vec(serlaplace(prod(m=1, nn, 1/(1 + x^m )))) \\ Michel Marcus, Oct 05 2017

Crossrefs

Column k=1 of A293299.

Cf. A081362.

Sequence in context: A050212 A369833 A354074 * A293487 A047865 A355285

Adjacent sequences: A293297 A293298 A293299 * A293301 A293302 A293303

Keyword

sign

Author

Seiichi Manyama, Oct 05 2017

Status

approved