A318784 - cp's OEIS frontend

A318784 Expansion of Product_{k>=1} 1/(1 - x^k)^(sigma_1(k)-k), where sigma_1(k) = sum of divisors of k (A000203).

n	a(n)
0	1
1	0
2	1
3	1
4	4
5	2
6	11
7	6
8	25
9	20
10	56
11	44
12	139
13	107
14	283
15	266
16	619
17	567
18	1317
19	1242
20	2680
21	2705
22	5403
23	5539
24	10947
25	11339
26	21291
27	23013
28	41494
29	45213
30	79991
31	88312
32	151546
33	170908
34	284901
35	324421
36	532505
37	611227
38	981002
39	1142000
40	1797451
41	2105773
42	3268765
43	3855050
44	5889704
45	7004451

[1, 0, 1, 1, 4, 2, 11, 6, 25, 20, 56, 44, 139, 107, 283, 266, 619, 567, 1317, 1242, 2680, 2705, 5403, 5539, 10947, 11339, 21291, 23013, 41494, 45213, 79991, 88312, 151546, 170908, 284901, 324421, 532505, 611227, 981002, 1142000, 1797451, 2105773, 3268765, 3855050, 5889704, 7004451]

cp's OEIS Frontend

A318784 Expansion of Product_{k>=1} 1/(1 - x^k)^(sigma_1(k)-k), where sigma_1(k) = sum of divisors of k (A000203).

Table of values

List of values