A320942 - cp's OEIS frontend

A320942 Expansion of Sum_{k>=1} (-1 + Product_{j>=1} (1 + x^(kj))/(1 - x^(kj))).

n	a(n)
1	2
2	6
3	10
4	20
5	26
6	54
7	66
8	120
9	164
10	262
11	346
12	572
13	730
14	1110
15	1506
16	2182
17	2866
18	4156
19	5402
20	7612
21	9978
22	13638
23	17730
24	24200
25	31092
26	41558
27	53572
28	70692
29	90250
30	118406
31	150146
32	194794
33	246610
34	316678
35	398730
36	509560
37	637594
38	808342
39	1009186
40	1270984
41	1578530
42	1978758
43	2447066

[2, 6, 10, 20, 26, 54, 66, 120, 164, 262, 346, 572, 730, 1110, 1506, 2182, 2866, 4156, 5402, 7612, 9978, 13638, 17730, 24200, 31092, 41558, 53572, 70692, 90250, 118406, 150146, 194794, 246610, 316678, 398730, 509560, 637594, 808342, 1009186, 1270984, 1578530, 1978758, 2447066]

cp's OEIS Frontend

A320942 Expansion of Sum_{k>=1} (-1 + Product_{j>=1} (1 + x^(kj))/(1 - x^(kj))).

Table of values

List of values

cp's OEIS Frontend

A320942 Expansion of Sum_{k>=1} (-1 + Product_{j>=1} (1 + x^(k*j))/(1 - x^(k*j))).

Table of values

List of values

A320942 Expansion of Sum_{k>=1} (-1 + Product_{j>=1} (1 + x^(kj))/(1 - x^(kj))).