A028586 - cp's OEIS frontend

A028586 Theta series of lattice with Gram matrix [2 1; 1 3].

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

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

cp's OEIS Frontend

A028586 Theta series of lattice with Gram matrix [2 1; 1 3].

Table of values

List of values

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

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

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