A028928 - cp's OEIS frontend

A028928 Theta series of quadratic form (or lattice) with Gram matrix [ 3, 1; 1, 5 ].

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

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

cp's OEIS Frontend

A028928 Theta series of quadratic form (or lattice) with Gram matrix [ 3, 1; 1, 5 ].

Table of values

List of values

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

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

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