A369116 - cp's OEIS frontend

A369116 Expansion of (1 - x)^2 * Sum_{j>=0} (x^j / (1 - Sum_{k=1..j} x^k)).

n	a(n)
0	1
1	-1
2	1
3	0
4	1
5	1
6	3
7	4
8	9
9	15
10	29
11	53
12	100
13	186
14	352
15	663
16	1257
17	2387
18	4547
19	8678
20	16602
21	31818
22	61092
23	117486
24	226277
25	436403
26	842731
27	1629297
28	3153466
29	6109704
30	11848634
31	22998892
32	44680016
33	86869392
34	169024094
35	329110519
36	641254825
37	1250261783
38	2439155631

[1, -1, 1, 0, 1, 1, 3, 4, 9, 15, 29, 53, 100, 186, 352, 663, 1257, 2387, 4547, 8678, 16602, 31818, 61092, 117486, 226277, 436403, 842731, 1629297, 3153466, 6109704, 11848634, 22998892, 44680016, 86869392, 169024094, 329110519, 641254825, 1250261783, 2439155631]

cp's OEIS Frontend

A369116 Expansion of (1 - x)^2 * Sum_{j>=0} (x^j / (1 - Sum_{k=1..j} x^k)).

Table of values

List of values