A307522 - cp's OEIS frontend

A307522 Expansion of Product_{k>=1} ((1 + x)^k - x^k)/((1 + x)^k + x^k).

n	a(n)
0	1
1	-2
2	2
3	-2
4	4
5	-10
6	22
7	-42
8	72
9	-116
10	188
11	-332
12	662
13	-1432
14	3148
15	-6736
16	13784
17	-26894
18	50254
19	-90782
20	160856
21	-285230
22	518170
23	-983710
24	1964800
25	-4090002
26	8705322
27	-18582722
28	39219572
29	-81148034
30	163946630
31	-323136562
32	622125982
33	-1173528562
34	2179230066

[1, -2, 2, -2, 4, -10, 22, -42, 72, -116, 188, -332, 662, -1432, 3148, -6736, 13784, -26894, 50254, -90782, 160856, -285230, 518170, -983710, 1964800, -4090002, 8705322, -18582722, 39219572, -81148034, 163946630, -323136562, 622125982, -1173528562, 2179230066]

cp's OEIS Frontend

A307522 Expansion of Product_{k>=1} ((1 + x)^k - x^k)/((1 + x)^k + x^k).

Table of values

List of values