A106031 - cp's OEIS frontend

A106031 a(n) is the number of orbits under the action of GL_2[Z] on the primitive binary quadratic forms of discriminant D, where D < 0 is the n-th fundamental discriminant.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	2
7	1
8	2
9	2
10	2
11	2
12	2
13	3
14	2
15	1
16	3
17	2
18	2
19	3
20	3
21	2
22	1
23	3
24	4
25	3
26	2
27	4
28	4
29	2
30	2
31	5
32	3
33	4
34	2
35	5
36	2
37	4
38	6
39	4
40	2
41	3
42	3
43	4
44	3
45	2
46	6
47	2
48	4
49	4
50	3
51	6
52	1
53	5
54	6
55	4
56	3
57	5
58	3
59	2
60	7

[1, 1, 1, 1, 1, 2, 1, 2, 2, 2, 2, 2, 3, 2, 1, 3, 2, 2, 3, 3, 2, 1, 3, 4, 3, 2, 4, 4, 2, 2, 5, 3, 4, 2, 5, 2, 4, 6, 4, 2, 3, 3, 4, 3, 2, 6, 2, 4, 4, 3, 6, 1, 5, 6, 4, 3, 5, 3, 2, 7]

cp's OEIS Frontend

A106031 a(n) is the number of orbits under the action of GL_2[Z] on the primitive binary quadratic forms of discriminant D, where D < 0 is the n-th fundamental discriminant.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	2
7	1
8	2
9	2
10	2
11	2
12	2
13	3
14	2
15	1
16	3
17	2
18	2
19	3
20	3
21	2
22	1
23	3
24	4
25	3
26	2
27	4
28	4
29	2
30	2
31	5
32	3
33	4
34	2
35	5
36	2
37	4
38	6
39	4
40	2
41	3
42	3
43	4
44	3
45	2
46	6
47	2
48	4
49	4
50	3
51	6
52	1
53	5
54	6
55	4
56	3
57	5
58	3
59	2
60	7

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	2
7	1
8	2
9	2
10	2
11	2
12	2
13	3
14	2
15	1
16	3
17	2
18	2
19	3
20	3
21	2
22	1
23	3
24	4
25	3
26	2
27	4
28	4
29	2
30	2
31	5
32	3
33	4
34	2
35	5
36	2
37	4
38	6
39	4
40	2
41	3
42	3
43	4
44	3
45	2
46	6
47	2
48	4
49	4
50	3
51	6
52	1
53	5
54	6
55	4
56	3
57	5
58	3
59	2
60	7

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	2
7	1
8	2
9	2
10	2
11	2
12	2
13	3
14	2
15	1
16	3
17	2
18	2
19	3
20	3
21	2
22	1
23	3
24	4
25	3
26	2
27	4
28	4
29	2
30	2
31	5
32	3
33	4
34	2
35	5
36	2
37	4
38	6
39	4
40	2
41	3
42	3
43	4
44	3
45	2
46	6
47	2
48	4
49	4
50	3
51	6
52	1
53	5
54	6
55	4
56	3
57	5
58	3
59	2
60	7