A214303 - cp's OEIS frontend

A214303 Expansion of f(-x^2, -x^4) * f(x^1, x^7) in powers of x where f(,) is Ramanujan's two-variable theta function.

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

[1, 1, -1, -1, -1, -1, 0, 1, 0, -1, 2, 0, -1, 0, 0, 1, 0, 1, 0, 0, 1, 1, 1, 0, -1, -1, -1, 1, 0, -1, -1, -3, 1, 0, -1, 0, 1, 0, 0, 0, -1, 1, 0, 0, 1, 2, -1, -1, 0, -1, 0, 0, 1, 1, 0, 1, -1, -1, 0, 2, 0, 0, 2, 0, 0, 0, 2, 0, 0, -1, -1, 0, 0, 0, 1, -1, 0, -1, -1]

cp's OEIS Frontend

A214303 Expansion of f(-x^2, -x^4) * f(x^1, x^7) in powers of x where f(,) is Ramanujan's two-variable theta function.

Table of values

List of values

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

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

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