A266821 - cp's OEIS frontend

A266821 Expansion of Product_{k>=1} (1 + 3*x^k) / (1 - x^k).

n	a(n)
0	1
1	4
2	8
3	24
4	44
5	88
6	176
7	312
8	544
9	924
10	1584
11	2552
12	4136
13	6488
14	10128
15	15632
16	23748
17	35640
18	53080
19	78136
20	114024
21	165552
22	237744
23	339544
24	481248
25	678236
26	949008
27	1321840
28	1830376
29	2521688
30	3456672
31	4717208
32	6406680
33	8666448
34	11672464
35	15660528
36	20934868

[1, 4, 8, 24, 44, 88, 176, 312, 544, 924, 1584, 2552, 4136, 6488, 10128, 15632, 23748, 35640, 53080, 78136, 114024, 165552, 237744, 339544, 481248, 678236, 949008, 1321840, 1830376, 2521688, 3456672, 4717208, 6406680, 8666448, 11672464, 15660528, 20934868]

cp's OEIS Frontend

A266821 Expansion of Product_{k>=1} (1 + 3*x^k) / (1 - x^k).

Table of values

List of values