A281615 - cp's OEIS frontend

A281615 Expansion of Sum_{i>=1} x^(i(i+1)/2)/(1 - x^(i(i+1)/2)) / Product_{j>=1} (1 - x^(j*(j+1)/2)).

n	a(n)
1	1
2	2
3	4
4	6
5	8
6	13
7	17
8	21
9	30
10	37
11	44
12	60
13	72
14	83
15	107
16	127
17	144
18	181
19	210
20	236
21	289
22	333
23	371
24	446
25	507
26	562
27	664
28	750
29	825
30	965
31	1083
32	1187
33	1371
34	1530
35	1668
36	1912
37	2122
38	2307
39	2618
40	2896
41	3138
42	3540
43	3897
44	4211
45	4717
46	5180
47	5581
48	6222
49	6803
50	7317
51	8116
52	8853
53	9497
54	10486
55	11401
56	12215
57	13430
58	14572
59	15576
60	17067

[1, 2, 4, 6, 8, 13, 17, 21, 30, 37, 44, 60, 72, 83, 107, 127, 144, 181, 210, 236, 289, 333, 371, 446, 507, 562, 664, 750, 825, 965, 1083, 1187, 1371, 1530, 1668, 1912, 2122, 2307, 2618, 2896, 3138, 3540, 3897, 4211, 4717, 5180, 5581, 6222, 6803, 7317, 8116, 8853, 9497, 10486, 11401, 12215, 13430, 14572, 15576, 17067]

cp's OEIS Frontend

A281615 Expansion of Sum_{i>=1} x^(i(i+1)/2)/(1 - x^(i(i+1)/2)) / Product_{j>=1} (1 - x^(j*(j+1)/2)).

Table of values

List of values

cp's OEIS Frontend

A281615 Expansion of Sum_{i>=1} x^(i*(i+1)/2)/(1 - x^(i*(i+1)/2)) / Product_{j>=1} (1 - x^(j*(j+1)/2)).

Table of values

List of values

A281615 Expansion of Sum_{i>=1} x^(i(i+1)/2)/(1 - x^(i(i+1)/2)) / Product_{j>=1} (1 - x^(j*(j+1)/2)).