A320238 - cp's OEIS frontend

A320238 G.f.: Product_{k>=1, j>=1} (1 + x^(kj)) / (1 - x^(kj))^2.

n	a(n)
0	1
1	3
2	11
3	31
4	85
5	209
6	504
7	1138
8	2514
9	5339
10	11098
11	22432
12	44535
13	86523
14	165496
15	311187
16	577190
17	1055524
18	1907423
19	3405574
20	6016826
21	10520065
22	18222215
23	31275320
24	53230224
25	89860112
26	150551503
27	250388180
28	413572707
29	678574627
30	1106396434
31	1793009335

[1, 3, 11, 31, 85, 209, 504, 1138, 2514, 5339, 11098, 22432, 44535, 86523, 165496, 311187, 577190, 1055524, 1907423, 3405574, 6016826, 10520065, 18222215, 31275320, 53230224, 89860112, 150551503, 250388180, 413572707, 678574627, 1106396434, 1793009335]

cp's OEIS Frontend

A320238 G.f.: Product_{k>=1, j>=1} (1 + x^(kj)) / (1 - x^(kj))^2.

Table of values

List of values

cp's OEIS Frontend

A320238 G.f.: Product_{k>=1, j>=1} (1 + x^(k*j)) / (1 - x^(k*j))^2.

Table of values

List of values

A320238 G.f.: Product_{k>=1, j>=1} (1 + x^(kj)) / (1 - x^(kj))^2.