A320564 - cp's OEIS frontend

A320564 Expansion of Product_{k>=1} (1 + x^k/(1 - x)^k)^k.

n	a(n)
0	1
1	1
2	3
3	10
4	30
5	87
6	249
7	705
8	1974
9	5471
10	15032
11	40997
12	111079
13	299151
14	801139
15	2134251
16	5657895
17	14930596
18	39232009
19	102673794
20	267692321
21	695440442
22	1800582809
23	4646964755
24	11956293758
25	30673060344
26	78470890246
27	200218512582
28	509557661691
29	1293664233400
30	3276659862518

[1, 1, 3, 10, 30, 87, 249, 705, 1974, 5471, 15032, 40997, 111079, 299151, 801139, 2134251, 5657895, 14930596, 39232009, 102673794, 267692321, 695440442, 1800582809, 4646964755, 11956293758, 30673060344, 78470890246, 200218512582, 509557661691, 1293664233400, 3276659862518]

cp's OEIS Frontend

A320564 Expansion of Product_{k>=1} (1 + x^k/(1 - x)^k)^k.

Table of values

List of values