A321481 - cp's OEIS frontend

A321481 Expansion of Sum_{n>=1} q^(n*(n-1)) / (1-q)^n.

n	a(n)
0	1
1	1
2	2
3	3
4	4
5	5
6	7
7	10
8	14
9	19
10	25
11	32
12	41
13	53
14	69
15	90
16	117
17	151
18	193
19	244
20	306
21	382
22	476
23	593
24	739
25	921
26	1147
27	1426
28	1768
29	2184
30	2687
31	3293
32	4022
33	4899
34	5955
35	7228
36	8764
37	10618
38	12855
39	15551
40	18794
41	22685
42	27340
43	32893
44	39500
45	47344
46	56641
47	67647
48	80666
49	96059
50	114254
51	135757
52	161164
53	191174
54	226603
55	268399

[1, 1, 2, 3, 4, 5, 7, 10, 14, 19, 25, 32, 41, 53, 69, 90, 117, 151, 193, 244, 306, 382, 476, 593, 739, 921, 1147, 1426, 1768, 2184, 2687, 3293, 4022, 4899, 5955, 7228, 8764, 10618, 12855, 15551, 18794, 22685, 27340, 32893, 39500, 47344, 56641, 67647, 80666, 96059, 114254, 135757, 161164, 191174, 226603, 268399]

cp's OEIS Frontend

A321481 Expansion of Sum_{n>=1} q^(n*(n-1)) / (1-q)^n.

Table of values

List of values