A270919 - cp's OEIS frontend

A270919 Coefficient of x^n in Product_{k>=1} ((1 + x^k) / (1 - x^k))^n.

n	a(n)
0	1
1	2
2	12
3	80
4	552
5	3912
6	28224
7	206208
8	1520784
9	11297546
10	84413912
11	633713808
12	4776117216
13	36115518376
14	273868321536
15	2081866609920
16	15859616674336
17	121046064563376
18	925411686479820
19	7085465166635440
20	54323193841192752
21	416993869451825424
22	3204447137019290944

[1, 2, 12, 80, 552, 3912, 28224, 206208, 1520784, 11297546, 84413912, 633713808, 4776117216, 36115518376, 273868321536, 2081866609920, 15859616674336, 121046064563376, 925411686479820, 7085465166635440, 54323193841192752, 416993869451825424, 3204447137019290944]

cp's OEIS Frontend

A270919 Coefficient of x^n in Product_{k>=1} ((1 + x^k) / (1 - x^k))^n.

Table of values

List of values