A003638 - cp's OEIS frontend

A003638 Number of classes per genus in quadratic field with discriminant -4n, -n == 2,3( mod 4).

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	2
8	2
9	1
10	1
11	3
12	3
13	1
14	1
15	2
16	1
17	3
18	4
19	1
20	2
21	3
22	1
23	1
24	3
25	4
26	2
27	2
28	2
29	1
30	2
31	5
32	2
33	1
34	2
35	1
36	5
37	6
38	1
39	4
40	2
41	7
42	1
43	1
44	3
45	3
46	3
47	4
48	2
49	3
50	5
51	3
52	1
53	1
54	7
55	4
56	2
57	2
58	2
59	2
60	8
61	7
62	2
63	3
64	4
65	4
66	1
67	5
68	3
69	7
70	3
71	1
72	4
73	5
74	3
75	4

[1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 3, 3, 1, 1, 2, 1, 3, 4, 1, 2, 3, 1, 1, 3, 4, 2, 2, 2, 1, 2, 5, 2, 1, 2, 1, 5, 6, 1, 4, 2, 7, 1, 1, 3, 3, 3, 4, 2, 3, 5, 3, 1, 1, 7, 4, 2, 2, 2, 2, 8, 7, 2, 3, 4, 4, 1, 5, 3, 7, 3, 1, 4, 5, 3, 4]

cp's OEIS Frontend

A003638 Number of classes per genus in quadratic field with discriminant -4n, -n == 2,3( mod 4).

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	2
8	2
9	1
10	1
11	3
12	3
13	1
14	1
15	2
16	1
17	3
18	4
19	1
20	2
21	3
22	1
23	1
24	3
25	4
26	2
27	2
28	2
29	1
30	2
31	5
32	2
33	1
34	2
35	1
36	5
37	6
38	1
39	4
40	2
41	7
42	1
43	1
44	3
45	3
46	3
47	4
48	2
49	3
50	5
51	3
52	1
53	1
54	7
55	4
56	2
57	2
58	2
59	2
60	8
61	7
62	2
63	3
64	4
65	4
66	1
67	5
68	3
69	7
70	3
71	1
72	4
73	5
74	3
75	4

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	2
8	2
9	1
10	1
11	3
12	3
13	1
14	1
15	2
16	1
17	3
18	4
19	1
20	2
21	3
22	1
23	1
24	3
25	4
26	2
27	2
28	2
29	1
30	2
31	5
32	2
33	1
34	2
35	1
36	5
37	6
38	1
39	4
40	2
41	7
42	1
43	1
44	3
45	3
46	3
47	4
48	2
49	3
50	5
51	3
52	1
53	1
54	7
55	4
56	2
57	2
58	2
59	2
60	8
61	7
62	2
63	3
64	4
65	4
66	1
67	5
68	3
69	7
70	3
71	1
72	4
73	5
74	3
75	4

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	2
8	2
9	1
10	1
11	3
12	3
13	1
14	1
15	2
16	1
17	3
18	4
19	1
20	2
21	3
22	1
23	1
24	3
25	4
26	2
27	2
28	2
29	1
30	2
31	5
32	2
33	1
34	2
35	1
36	5
37	6
38	1
39	4
40	2
41	7
42	1
43	1
44	3
45	3
46	3
47	4
48	2
49	3
50	5
51	3
52	1
53	1
54	7
55	4
56	2
57	2
58	2
59	2
60	8
61	7
62	2
63	3
64	4
65	4
66	1
67	5
68	3
69	7
70	3
71	1
72	4
73	5
74	3
75	4