A305870 - cp's OEIS frontend

A305870 Product_{n>=1} (1 + x^n)^a(n) = g.f. of A001147 (double factorial of odd numbers).

n	a(n)
1	1
2	3
3	12
4	90
5	816
6	9206
7	122028
8	1859550
9	32002076
10	613891800
11	12989299596
12	300556868286
13	7550646317520
14	204687481411974
15	5955892982437120
16	185158929517924710
17	6125200081143892800
18	214837724609534836158
19	7963817560398871790604
20	311101285877490394183800
21	12773912991134665452205048

[1, 3, 12, 90, 816, 9206, 122028, 1859550, 32002076, 613891800, 12989299596, 300556868286, 7550646317520, 204687481411974, 5955892982437120, 185158929517924710, 6125200081143892800, 214837724609534836158, 7963817560398871790604, 311101285877490394183800, 12773912991134665452205048]

cp's OEIS Frontend

A305870 Product_{n>=1} (1 + x^n)^a(n) = g.f. of A001147 (double factorial of odd numbers).

Table of values

List of values