A372375 - cp's OEIS frontend

A372375 Expansion of (1/x) * Series_Reversion( x * (1+x) / (1+x+x^3)^2 ).

n	a(n)
0	1
1	1
2	1
3	3
4	9
5	21
6	54
7	161
8	470
9	1347
10	4007
11	12199
12	37141
13	113802
14	352905
15	1101969
16	3455220
17	10891968
18	34515825
19	109814395
20	350616323
21	1123368287
22	3610647348
23	11637410625
24	37605280548
25	121812321775
26	395455199269
27	1286446544052
28	4192913001804
29	13690359696969

[1, 1, 1, 3, 9, 21, 54, 161, 470, 1347, 4007, 12199, 37141, 113802, 352905, 1101969, 3455220, 10891968, 34515825, 109814395, 350616323, 1123368287, 3610647348, 11637410625, 37605280548, 121812321775, 395455199269, 1286446544052, 4192913001804, 13690359696969]

cp's OEIS Frontend

A372375 Expansion of (1/x) * Series_Reversion( x * (1+x) / (1+x+x^3)^2 ).

Table of values

List of values