A028956 - cp's OEIS frontend

A028956 Theta series of quadratic form (or lattice) with Gram matrix [ 4, 1; 1, 4 ].

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

[1, 0, 4, 2, 0, 2, 0, 0, 8, 0, 0, 0, 6, 0, 0, 0, 0, 4, 4, 0, 6, 0, 0, 4, 0, 0, 0, 2, 0, 0, 4, 0, 12, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0, 0, 2, 0, 4, 10, 0, 4, 0, 0, 4, 0, 0, 0, 4, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0, 12, 0, 0, 0, 8, 0, 0, 2, 0, 0, 0, 0, 10, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 12, 4, 0, 4, 0, 0, 4, 0, 0, 0, 8]

cp's OEIS Frontend

A028956 Theta series of quadratic form (or lattice) with Gram matrix [ 4, 1; 1, 4 ].

Table of values

List of values

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

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

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