A137828 - cp's OEIS frontend

A137828 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
61	12072
62	0
63	0
64	16286

[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, 12072, 0, 0, 16286]

cp's OEIS Frontend

A137828 Expansion of phi(x) / f(-x^4)^2 in powers of x where phi(), f() are Ramanujan theta functions.

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