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A293302 E.g.f.: Product_{m>0} 1/(1 - x^m + x^(2*m)/2!). 2
1, 1, 3, 12, 66, 450, 3510, 32760, 335160, 3832920, 48648600, 673596000, 9961736400, 161026866000, 2775402630000, 50713246584000, 987048958896000, 20331148966128000, 440625863806128000, 10057578887708352000, 240218186856167520000, 6010719623406257760000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Seiichi Manyama, Table of n, a(n) for n = 0..444

MATHEMATICA

nmax = 25; CoefficientList[Series[1/Product[1 - x^k + x^(2*k)/2, {k, 1, nmax}], {x, 0, nmax}], x] * Range[0, nmax]! (* Vaclav Kotesovec, Oct 05 2017 *)

PROG

(PARI) x = 'x + O('x^40); Vec(serlaplace(prod(m=1, 40, 1/(1 - x^m + x^(2m)/2!)))) \\ Michel Marcus, Oct 05 2017

CROSSREFS

Column k=2 of A293301.

Sequence in context: A267323 A058790 A199746 * A248871 A080599 A120575

Adjacent sequences:  A293299 A293300 A293301 * A293303 A293304 A293305

KEYWORD

nonn

AUTHOR

Seiichi Manyama, Oct 05 2017

STATUS

approved

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Last modified June 20 01:36 EDT 2019. Contains 324223 sequences. (Running on oeis4.)