A344072 - cp's OEIS frontend

A344072 Smallest even k such that h(-k) = 2n, where h(D) is the class number of the quadratic field with discriminant D; or 0 if no such k exists.

n	a(n)
1	20
2	56
3	104
4	164
5	296
6	356
7	404
8	584
9	1172
10	776
11	1076
12	1316
13	1256
14	1364
15	1844
16	1784
17	2456
18	2504
19	4916
20	2756
21	3176
22	3416
23	3764
24	4424
25	4436
26	5924
27	6296
28	4616
29	5144
30	5444
31	10484
32	6536
33	9236
34	7124
35	7796
36	7556
37	12776
38	9176
39	8564
40	10856
41	11156
42	10436
43	11864
44	12536
45	14804
46	13604
47	13844
48	16376
49	15896
50	13796

[20, 56, 104, 164, 296, 356, 404, 584, 1172, 776, 1076, 1316, 1256, 1364, 1844, 1784, 2456, 2504, 4916, 2756, 3176, 3416, 3764, 4424, 4436, 5924, 6296, 4616, 5144, 5444, 10484, 6536, 9236, 7124, 7796, 7556, 12776, 9176, 8564, 10856, 11156, 10436, 11864, 12536, 14804, 13604, 13844, 16376, 15896, 13796]

cp's OEIS Frontend

A344072 Smallest even k such that h(-k) = 2n, where h(D) is the class number of the quadratic field with discriminant D; or 0 if no such k exists.

Table of values

List of values