A319661 - cp's OEIS frontend

A319661 2-rank of the class group of imaginary quadratic field with discriminant -k, k = A191483(n).

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

[0, 0, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 2, 1, 1, 1, 1, 2, 1, 1, 2, 1, 1, 1, 2, 2, 2, 2, 1, 1, 2, 2, 1, 2, 1, 1, 2, 1, 1, 1, 2, 3, 1, 1, 2, 1, 2, 1, 1, 2, 2, 2, 1, 1, 2, 2, 1, 2, 1, 1, 2, 1, 1, 2, 3, 1, 2, 1, 2, 2, 1, 1, 2, 2, 2, 2, 1, 1, 1, 2, 1, 2, 1, 2, 3, 2]

cp's OEIS Frontend

A319661 2-rank of the class group of imaginary quadratic field with discriminant -k, k = A191483(n).

Table of values

List of values

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

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

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