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
Keywords
Links
- Seiichi Manyama, Table of n, a(n) for n = 0..446
Programs
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PARI
nn = 30; x = 'x + O('x^nn); Vec(serlaplace(prod(m=1, nn, 1/(1 + x^m )))) \\ Michel Marcus, Oct 05 2017
Formula
a(n) = n! * A081362(n).