A002143 - cp's OEIS frontend

A002143 Class numbers h(-p) where p runs through the primes p == 3 (mod 4).

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

[1, 1, 1, 1, 3, 3, 1, 5, 3, 1, 7, 5, 3, 5, 3, 5, 5, 3, 7, 1, 11, 5, 13, 9, 3, 7, 5, 15, 7, 13, 11, 3, 3, 19, 3, 5, 19, 9, 3, 17, 9, 21, 15, 5, 7, 7, 25, 7, 9, 3, 21, 5, 3, 9, 5, 7, 25, 13, 5, 13, 3, 23, 11, 5, 5, 31, 13, 5, 21, 15, 5, 7, 9, 7, 33, 7, 21, 3, 29, 3, 31, 19, 5, 11, 15, 27, 17, 13]

cp's OEIS Frontend

A002143 Class numbers h(-p) where p runs through the primes p == 3 (mod 4).

Table of values

List of values

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

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

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