A355879 - cp's OEIS frontend

A355879 Class number of Q(sqrt((-1)^((p-1)/2)*p)), where p = prime(n).

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

[1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 5, 1, 3, 1, 1, 7, 1, 5, 3, 1, 1, 1, 5, 3, 1, 1, 5, 5, 1, 3, 1, 7, 1, 1, 11, 1, 5, 1, 13, 1, 1, 9, 3, 7, 5, 3, 1, 15, 1, 7, 3, 13, 1, 11, 1, 1, 3, 1, 3, 19, 1, 1, 3, 1, 5, 1, 1, 19, 9, 1, 3, 17, 1, 1, 5, 1, 9, 1, 21, 1, 15, 5, 1, 1, 1, 7]

cp's OEIS Frontend

A355879 Class number of Q(sqrt((-1)^((p-1)/2)*p)), where p = prime(n).

Table of values

List of values

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

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

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