A266647 - cp's OEIS frontend

A266647 Expansion of Product_{k>=1} (1 + x^k + x^(3*k)) / (1 - x^k).

n	a(n)
0	1
1	2
2	4
3	9
4	15
5	27
6	46
7	75
8	118
9	187
10	285
11	429
12	639
13	935
14	1354
15	1945
16	2758
17	3878
18	5417
19	7493
20	10300
21	14070
22	19087
23	25741
24	34542
25	46081
26	61185
27	80869
28	106391
29	139368
30	181867
31	236357
32	306060
33	394939
34	507860
35	650946
36	831792
37	1059600
38	1345920
39	1704880
40	2153682

[1, 2, 4, 9, 15, 27, 46, 75, 118, 187, 285, 429, 639, 935, 1354, 1945, 2758, 3878, 5417, 7493, 10300, 14070, 19087, 25741, 34542, 46081, 61185, 80869, 106391, 139368, 181867, 236357, 306060, 394939, 507860, 650946, 831792, 1059600, 1345920, 1704880, 2153682]

cp's OEIS Frontend

A266647 Expansion of Product_{k>=1} (1 + x^k + x^(3*k)) / (1 - x^k).

Table of values

List of values