A327745 - cp's OEIS frontend

A327745 Expansion of Product_{i>=1, j>=1} (1 + x^(ij(j + 1)/2)).

n	a(n)
0	1
1	1
2	1
3	3
4	3
5	4
6	8
7	9
8	11
9	19
10	23
11	28
12	42
13	51
14	62
15	89
16	108
17	130
18	178
19	215
20	260
21	344
22	413
23	496
24	639
25	766
26	916
27	1155
28	1380
29	1641
30	2040
31	2426
32	2870
33	3520
34	4166
35	4912
36	5960
37	7023
38	8246
39	9911
40	11634
41	13610
42	16224
43	18972
44	22111
45	26183
46	30507
47	35430
48	41698

[1, 1, 1, 3, 3, 4, 8, 9, 11, 19, 23, 28, 42, 51, 62, 89, 108, 130, 178, 215, 260, 344, 413, 496, 639, 766, 916, 1155, 1380, 1641, 2040, 2426, 2870, 3520, 4166, 4912, 5960, 7023, 8246, 9911, 11634, 13610, 16224, 18972, 22111, 26183, 30507, 35430, 41698]

cp's OEIS Frontend

A327745 Expansion of Product_{i>=1, j>=1} (1 + x^(ij(j + 1)/2)).

Table of values

List of values

cp's OEIS Frontend

A327745 Expansion of Product_{i>=1, j>=1} (1 + x^(i*j*(j + 1)/2)).

Table of values

List of values

A327745 Expansion of Product_{i>=1, j>=1} (1 + x^(ij(j + 1)/2)).