A215341 - cp's OEIS frontend

A215341 Expansion of series_reversion( x/(1+x^4*sum(k>=0, x^k)) ) / x.

n	a(n)
0	1
1	0
2	0
3	0
4	1
5	1
6	1
7	1
8	5
9	10
10	16
11	23
12	53
13	118
14	232
15	411
16	813
17	1718
18	3568
19	7012
20	13925
21	28603
22	59533
23	121878
24	247915
25	509136
26	1057278
27	2194138
28	4536943
29	9394145
30	19552639
31	40803472
32	85131237
33	177640486
34	371426592
35	778275264
36	1632420197
37	3425607187
38	7195476245
39	15134138683
40	31866093569

[1, 0, 0, 0, 1, 1, 1, 1, 5, 10, 16, 23, 53, 118, 232, 411, 813, 1718, 3568, 7012, 13925, 28603, 59533, 121878, 247915, 509136, 1057278, 2194138, 4536943, 9394145, 19552639, 40803472, 85131237, 177640486, 371426592, 778275264, 1632420197, 3425607187, 7195476245, 15134138683, 31866093569]

cp's OEIS Frontend

A215341 Expansion of series_reversion( x/(1+x^4*sum(k>=0, x^k)) ) / x.

Table of values

List of values