A318570 - cp's OEIS frontend

A318570 Expansion of Product_{k>=1} ((1 - x)^k + x^k)/((1 - x)^k - x^k).

n	a(n)
0	1
1	2
2	6
3	18
4	52
5	146
6	402
7	1090
8	2916
9	7708
10	20160
11	52236
12	134222
13	342304
14	867024
15	2182384
16	5461696
17	13595918
18	33677550
19	83036878
20	203859820
21	498470998
22	1214230586
23	2947204870
24	7129403128
25	17191258642
26	41328057106
27	99067295658
28	236822823336
29	564650823162
30	1342921372126

[1, 2, 6, 18, 52, 146, 402, 1090, 2916, 7708, 20160, 52236, 134222, 342304, 867024, 2182384, 5461696, 13595918, 33677550, 83036878, 203859820, 498470998, 1214230586, 2947204870, 7129403128, 17191258642, 41328057106, 99067295658, 236822823336, 564650823162, 1342921372126]

cp's OEIS Frontend

A318570 Expansion of Product_{k>=1} ((1 - x)^k + x^k)/((1 - x)^k - x^k).

Table of values

List of values