A215594 - cp's OEIS frontend

A215594 Expansion of f(-x, -x^4) / f(x, x^4) in powers of x where f(,) is Ramanujan's two-variable theta function.

n	a(n)
0	1
1	-2
2	2
3	-2
4	0
5	2
6	-4
7	6
8	-4
9	0
10	6
11	-12
12	14
13	-10
14	0
15	14
16	-26
17	30
18	-22
19	0
20	28
21	-52
22	60
23	-42
24	0
25	54
26	-100
27	112
28	-78
29	0
30	100
31	-180
32	202
33	-140
34	0
35	174
36	-314
37	350
38	-240
39	0
40	296
41	-532
42	588
43	-402
44	0
45	492
46	-876
47	966
48	-658
49	0
50	794
51	-1412
52	1550
53	-1050
54	0
55	1260
56	-2232

[1, -2, 2, -2, 0, 2, -4, 6, -4, 0, 6, -12, 14, -10, 0, 14, -26, 30, -22, 0, 28, -52, 60, -42, 0, 54, -100, 112, -78, 0, 100, -180, 202, -140, 0, 174, -314, 350, -240, 0, 296, -532, 588, -402, 0, 492, -876, 966, -658, 0, 794, -1412, 1550, -1050, 0, 1260, -2232]

cp's OEIS Frontend

A215594 Expansion of f(-x, -x^4) / f(x, x^4) in powers of x where f(,) is Ramanujan's two-variable theta function.

Table of values

List of values