A266822 - cp's OEIS frontend

A266822 Expansion of Product_{k>=1} ((1 + x^k) * (1 + 3*x^k)).

n	a(n)
0	1
1	4
2	7
3	20
4	35
5	60
6	124
7	200
8	324
9	524
10	865
11	1320
12	2016
13	3036
14	4453
15	6684
16	9668
17	13856
18	19792
19	27876
20	38956
21	54640
22	75320
23	103268
24	141191
25	191320
26	257892
27	346164
28	463284
29	615292
30	814883
31	1074556
32	1409904
33	1844284
34	2402756
35	3118020
36	4038164
37	5207344
38	6694116

[1, 4, 7, 20, 35, 60, 124, 200, 324, 524, 865, 1320, 2016, 3036, 4453, 6684, 9668, 13856, 19792, 27876, 38956, 54640, 75320, 103268, 141191, 191320, 257892, 346164, 463284, 615292, 814883, 1074556, 1409904, 1844284, 2402756, 3118020, 4038164, 5207344, 6694116]

cp's OEIS Frontend

A266822 Expansion of Product_{k>=1} ((1 + x^k) * (1 + 3*x^k)).

Table of values

List of values