A305868 - cp's OEIS frontend

A305868 Product_{n>=1} 1/(1 - x^n)^a(n) = g.f. of A001147 (double factorial of odd numbers).

n	a(n)
1	1
2	2
3	12
4	87
5	816
6	9194
7	122028
8	1859460
9	32002076
10	613890984
11	12989299596
12	300556859080
13	7550646317520
14	204687481289946
15	5955892982437120
16	185158929516065160
17	6125200081143892800
18	214837724609502834082
19	7963817560398871790604
20	311101285877489780292000
21	12773912991134665452205048

[1, 2, 12, 87, 816, 9194, 122028, 1859460, 32002076, 613890984, 12989299596, 300556859080, 7550646317520, 204687481289946, 5955892982437120, 185158929516065160, 6125200081143892800, 214837724609502834082, 7963817560398871790604, 311101285877489780292000, 12773912991134665452205048]

cp's OEIS Frontend

A305868 Product_{n>=1} 1/(1 - x^n)^a(n) = g.f. of A001147 (double factorial of odd numbers).

Table of values

List of values