A284474 - cp's OEIS frontend

A284474 Expansion of Product_{k>=1} (1 + x^(2k))^(2k)/(1 + x^(2k-1))^(2k-1).

n	a(n)
0	1
1	-1
2	3
3	-6
4	11
5	-22
6	42
7	-74
8	131
9	-231
10	395
11	-669
12	1122
13	-1851
14	3029
15	-4915
16	7891
17	-12572
18	19881
19	-31203
20	48657
21	-75391
22	116096
23	-177792
24	270822
25	-410394
26	618905
27	-929052
28	1388403
29	-2066140
30	3062270
31	-4520912
32	6649463
33	-9745072
34	14232278
35	-20716355
36	30057438

[1, -1, 3, -6, 11, -22, 42, -74, 131, -231, 395, -669, 1122, -1851, 3029, -4915, 7891, -12572, 19881, -31203, 48657, -75391, 116096, -177792, 270822, -410394, 618905, -929052, 1388403, -2066140, 3062270, -4520912, 6649463, -9745072, 14232278, -20716355, 30057438]

cp's OEIS Frontend

A284474 Expansion of Product_{k>=1} (1 + x^(2k))^(2k)/(1 + x^(2k-1))^(2k-1).

Table of values

List of values

cp's OEIS Frontend

A284474 Expansion of Product_{k>=1} (1 + x^(2*k))^(2*k)/(1 + x^(2*k-1))^(2*k-1).

Table of values

List of values

A284474 Expansion of Product_{k>=1} (1 + x^(2k))^(2k)/(1 + x^(2k-1))^(2k-1).