A186537 - cp's OEIS frontend

A186537 G.f.: Sum( x^k/(1-2*x+x^k), k=1..oo).

n	a(n)
0	0
1	1
2	2
3	4
4	7
5	12
6	20
7	34
8	58
9	101
10	178
11	318
12	574
13	1046
14	1920
15	3548
16	6593
17	12312
18	23092
19	43480
20	82154
21	155716
22	295984
23	564050
24	1077400
25	2062311
26	3955186
27	7598756
28	14622318
29	28179338
30	54379520
31	105071498
32	203254164
33	393607534
34	763001000
35	1480458656
36	2875091021
37	5588152920
38	10869906136

[0, 1, 2, 4, 7, 12, 20, 34, 58, 101, 178, 318, 574, 1046, 1920, 3548, 6593, 12312, 23092, 43480, 82154, 155716, 295984, 564050, 1077400, 2062311, 3955186, 7598756, 14622318, 28179338, 54379520, 105071498, 203254164, 393607534, 763001000, 1480458656, 2875091021, 5588152920, 10869906136]

cp's OEIS Frontend

A186537 G.f.: Sum( x^k/(1-2*x+x^k), k=1..oo).

Table of values

List of values