A293489 E.g.f.: Product_{m>0} (1 + x^(2*m-1) + x^(4*m-2)/2! + x^(6*m-3)/3!).

1, 1, 1, 7, 24, 180, 1200, 10080, 97440, 997920, 12096000, 149688000, 2128896000, 31135104000, 515804889600, 8717829120000, 162151621632000, 3092504583168000, 63934815200256000, 1366817864315904000, 31019500604252160000, 733013100880220160000

Offset: 0

Author

Seiichi Manyama, Oct 10 2017

Keywords

• nonn

Links

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

Crossrefs

Column k=3 of A293486.

Cf. A293463.

Programs

PARI

N=66; x='x+O('x^N); Vec(serlaplace(prod(m=1, N, 1+x^(2*m-1)+x^(4*m-2)/2+x^(6*m-3)/6)))