A253623 - cp's OEIS frontend

A253623 Expansion of phi(q) * f(q, q^2)^2 / f(q^2, q^4) in powers of q where phi(), f() are Ramanujan theta functions.

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

[1, 4, 6, 4, 0, 0, 6, 8, 6, 4, 0, 0, 0, 8, 12, 0, 0, 0, 6, 8, 0, 8, 0, 0, 6, 4, 12, 4, 0, 0, 0, 8, 6, 0, 0, 0, 0, 8, 12, 8, 0, 0, 12, 8, 0, 0, 0, 0, 0, 12, 6, 0, 0, 0, 6, 0, 12, 8, 0, 0, 0, 8, 12, 8, 0, 0, 0, 8, 0, 0, 0, 0, 6, 8, 12, 4, 0, 0, 12, 8, 0, 4, 0, 0]

cp's OEIS Frontend

A253623 Expansion of phi(q) * f(q, q^2)^2 / f(q^2, q^4) in powers of q where phi(), f() are Ramanujan theta functions.

Table of values

List of values

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

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

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