A137830 - cp's OEIS frontend

A137830 Expansion of phi(-x) / f(-x^4)^2 in powers of x where phi(), f() are Ramanujan theta functions.

n	a(n)
0	1
1	-2
2	0
3	0
4	4
5	-4
6	0
7	0
8	9
9	-12
10	0
11	0
12	20
13	-24
14	0
15	0
16	42
17	-50
18	0
19	0
20	80
21	-92
22	0
23	0
24	147
25	-172
26	0
27	0
28	260
29	-296
30	0
31	0
32	445
33	-510
34	0
35	0
36	744
37	-840
38	0
39	0
40	1215
41	-1372
42	0
43	0
44	1944
45	-2176
46	0
47	0
48	3059
49	-3424
50	0
51	0
52	4740
53	-5268
54	0
55	0
56	7239
57	-8040
58	0
59	0
60	10920

[1, -2, 0, 0, 4, -4, 0, 0, 9, -12, 0, 0, 20, -24, 0, 0, 42, -50, 0, 0, 80, -92, 0, 0, 147, -172, 0, 0, 260, -296, 0, 0, 445, -510, 0, 0, 744, -840, 0, 0, 1215, -1372, 0, 0, 1944, -2176, 0, 0, 3059, -3424, 0, 0, 4740, -5268, 0, 0, 7239, -8040, 0, 0, 10920]

cp's OEIS Frontend

A137830 Expansion of phi(-x) / f(-x^4)^2 in powers of x where phi(), f() are Ramanujan theta functions.

Table of values

List of values