A122134 - cp's OEIS frontend

A122134 Expansion of Sum_{k>=0} x^(k^2+k)/((1-x)(1-x^2)...(1-x^(2k))).

n	a(n)
0	1
1	0
2	1
3	1
4	2
5	2
6	4
7	4
8	6
9	7
10	10
11	11
12	16
13	18
14	24
15	28
16	36
17	42
18	54
19	62
20	78
21	91
22	112
23	130
24	159
25	184
26	222
27	258
28	308
29	356
30	424
31	488
32	576
33	664
34	778
35	894
36	1044
37	1196
38	1389
39	1590
40	1838
41	2098
42	2419
43	2754
44	3162
45	3596
46	4114
47	4668
48	5328
49	6032
50	6864
51	7760
52	8806
53	9936
54	11252

[1, 0, 1, 1, 2, 2, 4, 4, 6, 7, 10, 11, 16, 18, 24, 28, 36, 42, 54, 62, 78, 91, 112, 130, 159, 184, 222, 258, 308, 356, 424, 488, 576, 664, 778, 894, 1044, 1196, 1389, 1590, 1838, 2098, 2419, 2754, 3162, 3596, 4114, 4668, 5328, 6032, 6864, 7760, 8806, 9936, 11252]

cp's OEIS Frontend

A122134 Expansion of Sum_{k>=0} x^(k^2+k)/((1-x)(1-x^2)...(1-x^(2k))).

Table of values

List of values