A336980 - cp's OEIS frontend

A336980 Expansion of Product_{k>=1} (1 + x^k * (1 + k*x)).

n	a(n)
0	1
1	1
2	2
3	4
4	8
5	13
6	22
7	39
8	65
9	104
10	160
11	263
12	413
13	646
14	975
15	1479
16	2198
17	3354
18	5017
19	7389
20	10770
21	15721
22	22668
23	32663
24	47200
25	67761
26	96389
27	135977
28	191431
29	268805
30	376211
31	523692
32	730301
33	1014029
34	1401553
35	1925074
36	2638522
37	3608182
38	4924194
39	6694070
40	9088239
41	12323707
42	16668255

[1, 1, 2, 4, 8, 13, 22, 39, 65, 104, 160, 263, 413, 646, 975, 1479, 2198, 3354, 5017, 7389, 10770, 15721, 22668, 32663, 47200, 67761, 96389, 135977, 191431, 268805, 376211, 523692, 730301, 1014029, 1401553, 1925074, 2638522, 3608182, 4924194, 6694070, 9088239, 12323707, 16668255]

cp's OEIS Frontend

A336980 Expansion of Product_{k>=1} (1 + x^k * (1 + k*x)).

Table of values

List of values