A127786 - cp's OEIS frontend

A127786 Expansion of phi(q) * phi(q^2) * phi(-q^4) in powers of q where phi() is a Ramanujan theta function.

n	a(n)
0	1
1	2
2	2
3	4
4	0
5	-4
6	0
7	-8
8	-2
9	6
10	-8
11	4
12	0
13	-12
14	0
15	-8
16	-4
17	8
18	10
19	12
20	0
21	-8
22	0
23	-8
24	8
25	14
26	-8
27	16
28	0
29	-4
30	0
31	-16
32	6
33	16
34	16
35	8
36	0
37	-20
38	0
39	-8
40	-8
41	8
42	-16
43	20
44	0
45	-20
46	0
47	-16
48	-8
49	18
50	10
51	8
52	0
53	-12
54	0
55	-24
56	0
57	16
58	-24
59	12
60	0
61	-20
62	0
63	-24
64	12
65	8
66	16
67	28
68	0
69	-16
70	0
71	-8
72	-10
73	32
74	-8
75	20
76	0
77	-16
78	0
79	-16
80	-8
81	18
82	32
83	20
84	0
85	-24
86	0

[1, 2, 2, 4, 0, -4, 0, -8, -2, 6, -8, 4, 0, -12, 0, -8, -4, 8, 10, 12, 0, -8, 0, -8, 8, 14, -8, 16, 0, -4, 0, -16, 6, 16, 16, 8, 0, -20, 0, -8, -8, 8, -16, 20, 0, -20, 0, -16, -8, 18, 10, 8, 0, -12, 0, -24, 0, 16, -24, 12, 0, -20, 0, -24, 12, 8, 16, 28, 0, -16, 0, -8, -10, 32, -8, 20, 0, -16, 0, -16, -8, 18, 32, 20, 0, -24, 0]

cp's OEIS Frontend

A127786 Expansion of phi(q) * phi(q^2) * phi(-q^4) in powers of q where phi() is a Ramanujan theta function.

Table of values

List of values

n	a(n)
0	1
1	2
2	2
3	4
4	0
5	-4
6	0
7	-8
8	-2
9	6
10	-8
11	4
12	0
13	-12
14	0
15	-8
16	-4
17	8
18	10
19	12
20	0
21	-8
22	0
23	-8
24	8
25	14
26	-8
27	16
28	0
29	-4
30	0
31	-16
32	6
33	16
34	16
35	8
36	0
37	-20
38	0
39	-8
40	-8
41	8
42	-16
43	20
44	0
45	-20
46	0
47	-16
48	-8
49	18
50	10
51	8
52	0
53	-12
54	0
55	-24
56	0
57	16
58	-24
59	12
60	0
61	-20
62	0
63	-24
64	12
65	8
66	16
67	28
68	0
69	-16
70	0
71	-8
72	-10
73	32
74	-8
75	20
76	0
77	-16
78	0
79	-16
80	-8
81	18
82	32
83	20
84	0
85	-24
86	0

n	a(n)
0	1
1	2
2	2
3	4
4	0
5	-4
6	0
7	-8
8	-2
9	6
10	-8
11	4
12	0
13	-12
14	0
15	-8
16	-4
17	8
18	10
19	12
20	0
21	-8
22	0
23	-8
24	8
25	14
26	-8
27	16
28	0
29	-4
30	0
31	-16
32	6
33	16
34	16
35	8
36	0
37	-20
38	0
39	-8
40	-8
41	8
42	-16
43	20
44	0
45	-20
46	0
47	-16
48	-8
49	18
50	10
51	8
52	0
53	-12
54	0
55	-24
56	0
57	16
58	-24
59	12
60	0
61	-20
62	0
63	-24
64	12
65	8
66	16
67	28
68	0
69	-16
70	0
71	-8
72	-10
73	32
74	-8
75	20
76	0
77	-16
78	0
79	-16
80	-8
81	18
82	32
83	20
84	0
85	-24
86	0

n	a(n)
0	1
1	2
2	2
3	4
4	0
5	-4
6	0
7	-8
8	-2
9	6
10	-8
11	4
12	0
13	-12
14	0
15	-8
16	-4
17	8
18	10
19	12
20	0
21	-8
22	0
23	-8
24	8
25	14
26	-8
27	16
28	0
29	-4
30	0
31	-16
32	6
33	16
34	16
35	8
36	0
37	-20
38	0
39	-8
40	-8
41	8
42	-16
43	20
44	0
45	-20
46	0
47	-16
48	-8
49	18
50	10
51	8
52	0
53	-12
54	0
55	-24
56	0
57	16
58	-24
59	12
60	0
61	-20
62	0
63	-24
64	12
65	8
66	16
67	28
68	0
69	-16
70	0
71	-8
72	-10
73	32
74	-8
75	20
76	0
77	-16
78	0
79	-16
80	-8
81	18
82	32
83	20
84	0
85	-24
86	0