A301555 - cp's OEIS frontend

A301555 Expansion of Product_{k>=1} ((1 + x^k)/(1 - x^k))^(sigma(k)).

n	a(n)
0	1
1	2
2	8
3	22
4	62
5	154
6	392
7	914
8	2136
9	4776
10	10544
11	22626
12	47982
13	99538
14	204100
15	411714
16	821130
17	1616170
18	3148812
19	6066338
20	11579954
21	21893214
22	41045780
23	76306030
24	140783060
25	257789064
26	468783092
27	846697340
28	1519599658
29	2710476106
30	4806507720
31	8475250510

[1, 2, 8, 22, 62, 154, 392, 914, 2136, 4776, 10544, 22626, 47982, 99538, 204100, 411714, 821130, 1616170, 3148812, 6066338, 11579954, 21893214, 41045780, 76306030, 140783060, 257789064, 468783092, 846697340, 1519599658, 2710476106, 4806507720, 8475250510]

cp's OEIS Frontend

A301555 Expansion of Product_{k>=1} ((1 + x^k)/(1 - x^k))^(sigma(k)).

Table of values

List of values