A320586 - cp's OEIS frontend

A320586 Expansion of (1/(1 - x)) * Sum_{k>=1} k*x^k/(x^k + (1 - x)^k).

n	a(n)
1	1
2	3
3	10
4	27
5	66
6	156
7	365
8	843
9	1909
10	4238
11	9274
12	20136
13	43564
14	94013
15	202155
16	432475
17	919820
18	1945767
19	4098852
20	8610922
21	18061277
22	37844128
23	79212323
24	165565920
25	345412341
26	719047566
27	1493488927
28	3095654281
29	6405734456
30	13238611241
31	27336762272
32	56416256443
33	116376652600

[1, 3, 10, 27, 66, 156, 365, 843, 1909, 4238, 9274, 20136, 43564, 94013, 202155, 432475, 919820, 1945767, 4098852, 8610922, 18061277, 37844128, 79212323, 165565920, 345412341, 719047566, 1493488927, 3095654281, 6405734456, 13238611241, 27336762272, 56416256443, 116376652600]

cp's OEIS Frontend

A320586 Expansion of (1/(1 - x)) * Sum_{k>=1} k*x^k/(x^k + (1 - x)^k).

Table of values

List of values