A122857 - cp's OEIS frontend

A122857 Expansion of (phi(q)^2 + phi(q^3)^2) / 2 in powers of q where phi() is a Ramanujan theta function.

n	a(n)
0	1
1	2
2	2
3	2
4	2
5	4
6	2
7	0
8	2
9	2
10	4
11	0
12	2
13	4
14	0
15	4
16	2
17	4
18	2
19	0
20	4
21	0
22	0
23	0
24	2
25	6
26	4
27	2
28	0
29	4
30	4
31	0
32	2
33	0
34	4
35	0
36	2
37	4
38	0
39	4
40	4
41	4
42	0
43	0
44	0
45	4
46	0
47	0
48	2
49	2
50	6
51	4
52	4
53	4
54	2
55	0
56	0
57	0
58	4
59	0
60	4
61	4
62	0
63	0
64	2
65	8
66	0
67	0
68	4
69	0
70	0
71	0
72	2
73	4
74	4
75	6
76	0
77	0
78	4
79	0
80	4
81	2
82	4
83	0
84	0
85	8
86	0
87	4
88	0
89	4
90	4
91	0
92	0
93	0
94	0
95	0
96	2
97	4
98	2
99	0
100	6
101	4
102	4
103	0
104	4

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

cp's OEIS Frontend

A122857 Expansion of (phi(q)^2 + phi(q^3)^2) / 2 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	2
4	2
5	4
6	2
7	0
8	2
9	2
10	4
11	0
12	2
13	4
14	0
15	4
16	2
17	4
18	2
19	0
20	4
21	0
22	0
23	0
24	2
25	6
26	4
27	2
28	0
29	4
30	4
31	0
32	2
33	0
34	4
35	0
36	2
37	4
38	0
39	4
40	4
41	4
42	0
43	0
44	0
45	4
46	0
47	0
48	2
49	2
50	6
51	4
52	4
53	4
54	2
55	0
56	0
57	0
58	4
59	0
60	4
61	4
62	0
63	0
64	2
65	8
66	0
67	0
68	4
69	0
70	0
71	0
72	2
73	4
74	4
75	6
76	0
77	0
78	4
79	0
80	4
81	2
82	4
83	0
84	0
85	8
86	0
87	4
88	0
89	4
90	4
91	0
92	0
93	0
94	0
95	0
96	2
97	4
98	2
99	0
100	6
101	4
102	4
103	0
104	4

n	a(n)
0	1
1	2
2	2
3	2
4	2
5	4
6	2
7	0
8	2
9	2
10	4
11	0
12	2
13	4
14	0
15	4
16	2
17	4
18	2
19	0
20	4
21	0
22	0
23	0
24	2
25	6
26	4
27	2
28	0
29	4
30	4
31	0
32	2
33	0
34	4
35	0
36	2
37	4
38	0
39	4
40	4
41	4
42	0
43	0
44	0
45	4
46	0
47	0
48	2
49	2
50	6
51	4
52	4
53	4
54	2
55	0
56	0
57	0
58	4
59	0
60	4
61	4
62	0
63	0
64	2
65	8
66	0
67	0
68	4
69	0
70	0
71	0
72	2
73	4
74	4
75	6
76	0
77	0
78	4
79	0
80	4
81	2
82	4
83	0
84	0
85	8
86	0
87	4
88	0
89	4
90	4
91	0
92	0
93	0
94	0
95	0
96	2
97	4
98	2
99	0
100	6
101	4
102	4
103	0
104	4

n	a(n)
0	1
1	2
2	2
3	2
4	2
5	4
6	2
7	0
8	2
9	2
10	4
11	0
12	2
13	4
14	0
15	4
16	2
17	4
18	2
19	0
20	4
21	0
22	0
23	0
24	2
25	6
26	4
27	2
28	0
29	4
30	4
31	0
32	2
33	0
34	4
35	0
36	2
37	4
38	0
39	4
40	4
41	4
42	0
43	0
44	0
45	4
46	0
47	0
48	2
49	2
50	6
51	4
52	4
53	4
54	2
55	0
56	0
57	0
58	4
59	0
60	4
61	4
62	0
63	0
64	2
65	8
66	0
67	0
68	4
69	0
70	0
71	0
72	2
73	4
74	4
75	6
76	0
77	0
78	4
79	0
80	4
81	2
82	4
83	0
84	0
85	8
86	0
87	4
88	0
89	4
90	4
91	0
92	0
93	0
94	0
95	0
96	2
97	4
98	2
99	0
100	6
101	4
102	4
103	0
104	4