A204531 - cp's OEIS frontend

A204531 Expansion of phi(q) * phi(-q^4) in powers of q where phi() is a Ramanujan theta function.

n	a(n)
0	1
1	2
2	0
3	0
4	0
5	-4
6	0
7	0
8	-4
9	2
10	0
11	0
12	0
13	-4
14	0
15	0
16	4
17	4
18	0
19	0
20	0
21	0
22	0
23	0
24	0
25	6
26	0
27	0
28	0
29	-4
30	0
31	0
32	4
33	0
34	0
35	0
36	0
37	-4
38	0
39	0
40	-8
41	4
42	0
43	0
44	0
45	-4
46	0
47	0
48	0
49	2
50	0
51	0
52	0
53	-4
54	0
55	0
56	0
57	0
58	0
59	0
60	0
61	-4
62	0
63	0
64	4
65	8
66	0
67	0
68	0
69	0
70	0
71	0
72	-4
73	4
74	0
75	0
76	0
77	0
78	0
79	0
80	8
81	2
82	0
83	0
84	0
85	-8
86	0
87	0
88	0
89	4
90	0
91	0
92	0
93	0
94	0
95	0
96	0
97	4
98	0

[1, 2, 0, 0, 0, -4, 0, 0, -4, 2, 0, 0, 0, -4, 0, 0, 4, 4, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, -4, 0, 0, 4, 0, 0, 0, 0, -4, 0, 0, -8, 4, 0, 0, 0, -4, 0, 0, 0, 2, 0, 0, 0, -4, 0, 0, 0, 0, 0, 0, 0, -4, 0, 0, 4, 8, 0, 0, 0, 0, 0, 0, -4, 4, 0, 0, 0, 0, 0, 0, 8, 2, 0, 0, 0, -8, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 4, 0]

cp's OEIS Frontend

A204531 Expansion of phi(q) * 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	0
3	0
4	0
5	-4
6	0
7	0
8	-4
9	2
10	0
11	0
12	0
13	-4
14	0
15	0
16	4
17	4
18	0
19	0
20	0
21	0
22	0
23	0
24	0
25	6
26	0
27	0
28	0
29	-4
30	0
31	0
32	4
33	0
34	0
35	0
36	0
37	-4
38	0
39	0
40	-8
41	4
42	0
43	0
44	0
45	-4
46	0
47	0
48	0
49	2
50	0
51	0
52	0
53	-4
54	0
55	0
56	0
57	0
58	0
59	0
60	0
61	-4
62	0
63	0
64	4
65	8
66	0
67	0
68	0
69	0
70	0
71	0
72	-4
73	4
74	0
75	0
76	0
77	0
78	0
79	0
80	8
81	2
82	0
83	0
84	0
85	-8
86	0
87	0
88	0
89	4
90	0
91	0
92	0
93	0
94	0
95	0
96	0
97	4
98	0

n	a(n)
0	1
1	2
2	0
3	0
4	0
5	-4
6	0
7	0
8	-4
9	2
10	0
11	0
12	0
13	-4
14	0
15	0
16	4
17	4
18	0
19	0
20	0
21	0
22	0
23	0
24	0
25	6
26	0
27	0
28	0
29	-4
30	0
31	0
32	4
33	0
34	0
35	0
36	0
37	-4
38	0
39	0
40	-8
41	4
42	0
43	0
44	0
45	-4
46	0
47	0
48	0
49	2
50	0
51	0
52	0
53	-4
54	0
55	0
56	0
57	0
58	0
59	0
60	0
61	-4
62	0
63	0
64	4
65	8
66	0
67	0
68	0
69	0
70	0
71	0
72	-4
73	4
74	0
75	0
76	0
77	0
78	0
79	0
80	8
81	2
82	0
83	0
84	0
85	-8
86	0
87	0
88	0
89	4
90	0
91	0
92	0
93	0
94	0
95	0
96	0
97	4
98	0

n	a(n)
0	1
1	2
2	0
3	0
4	0
5	-4
6	0
7	0
8	-4
9	2
10	0
11	0
12	0
13	-4
14	0
15	0
16	4
17	4
18	0
19	0
20	0
21	0
22	0
23	0
24	0
25	6
26	0
27	0
28	0
29	-4
30	0
31	0
32	4
33	0
34	0
35	0
36	0
37	-4
38	0
39	0
40	-8
41	4
42	0
43	0
44	0
45	-4
46	0
47	0
48	0
49	2
50	0
51	0
52	0
53	-4
54	0
55	0
56	0
57	0
58	0
59	0
60	0
61	-4
62	0
63	0
64	4
65	8
66	0
67	0
68	0
69	0
70	0
71	0
72	-4
73	4
74	0
75	0
76	0
77	0
78	0
79	0
80	8
81	2
82	0
83	0
84	0
85	-8
86	0
87	0
88	0
89	4
90	0
91	0
92	0
93	0
94	0
95	0
96	0
97	4
98	0