A278690 - cp's OEIS frontend

A278690 Expansion of Product_{n>=1} (1 - x^(3*n))/(1 - x^n)^2 in powers of x.

n	a(n)
0	1
1	2
2	5
3	9
4	18
5	31
6	54
7	88
8	144
9	225
10	351
11	531
12	800
13	1179
14	1728
15	2492
16	3573
17	5058
18	7119
19	9918
20	13743
21	18882
22	25810
23	35028
24	47313
25	63513
26	84883
27	112833
28	149373
29	196803
30	258309
31	337590
32	439650
33	570357
34	737496
35	950270
36	1220688
37	1563021
38	1995642
39	2540466
40	3225386

[1, 2, 5, 9, 18, 31, 54, 88, 144, 225, 351, 531, 800, 1179, 1728, 2492, 3573, 5058, 7119, 9918, 13743, 18882, 25810, 35028, 47313, 63513, 84883, 112833, 149373, 196803, 258309, 337590, 439650, 570357, 737496, 950270, 1220688, 1563021, 1995642, 2540466, 3225386]

cp's OEIS Frontend

A278690 Expansion of Product_{n>=1} (1 - x^(3*n))/(1 - x^n)^2 in powers of x.

Table of values

List of values