A051993 - cp's OEIS frontend

A051993 Consider real quadratic fields of ERD-type with class groups of exponent 2 and discriminants of the form D = r^2*k^2+k, k odd; sequence gives values of r.

n	a(n)
1	3
2	4
3	5
4	1
5	6
6	2
7	1
8	8
9	3
10	2
11	2
12	1
13	11
14	12
15	13
16	1
17	14
18	2
19	1
20	5
21	3
22	16
23	17
24	6
25	19
26	4
27	1
28	22
29	22
30	23
31	2
32	2
33	10
34	2
35	1
36	31
37	34
38	34
39	2
40	1
41	5
42	7
43	36
44	37
45	2
46	1
47	13
48	8
49	8
50	1
51	14
52	9
53	2
54	46
55	47
56	16
57	3
58	4
59	56
60	3
61	2
62	58
63	20
64	12
65	2
66	3
67	2
68	23
69	10
70	2
71	24
72	73
73	5
74	4
75	2
76	16
77	2
78	4
79	8
80	8
81	19
82	98
83	20
84	2
85	2
86	4
87	24
88	11
89	122
90	4
91	4
92	142
93	26
94	68
95	242
96	278
97	22
98	32

[3, 4, 5, 1, 6, 2, 1, 8, 3, 2, 2, 1, 11, 12, 13, 1, 14, 2, 1, 5, 3, 16, 17, 6, 19, 4, 1, 22, 22, 23, 2, 2, 10, 2, 1, 31, 34, 34, 2, 1, 5, 7, 36, 37, 2, 1, 13, 8, 8, 1, 14, 9, 2, 46, 47, 16, 3, 4, 56, 3, 2, 58, 20, 12, 2, 3, 2, 23, 10, 2, 24, 73, 5, 4, 2, 16, 2, 4, 8, 8, 19, 98, 20, 2, 2, 4, 24, 11, 122, 4, 4, 142, 26, 68, 242, 278, 22, 32]

cp's OEIS Frontend

A051993 Consider real quadratic fields of ERD-type with class groups of exponent 2 and discriminants of the form D = r^2*k^2+k, k odd; sequence gives values of r.

Table of values

List of values

n	a(n)
1	3
2	4
3	5
4	1
5	6
6	2
7	1
8	8
9	3
10	2
11	2
12	1
13	11
14	12
15	13
16	1
17	14
18	2
19	1
20	5
21	3
22	16
23	17
24	6
25	19
26	4
27	1
28	22
29	22
30	23
31	2
32	2
33	10
34	2
35	1
36	31
37	34
38	34
39	2
40	1
41	5
42	7
43	36
44	37
45	2
46	1
47	13
48	8
49	8
50	1
51	14
52	9
53	2
54	46
55	47
56	16
57	3
58	4
59	56
60	3
61	2
62	58
63	20
64	12
65	2
66	3
67	2
68	23
69	10
70	2
71	24
72	73
73	5
74	4
75	2
76	16
77	2
78	4
79	8
80	8
81	19
82	98
83	20
84	2
85	2
86	4
87	24
88	11
89	122
90	4
91	4
92	142
93	26
94	68
95	242
96	278
97	22
98	32

n	a(n)
1	3
2	4
3	5
4	1
5	6
6	2
7	1
8	8
9	3
10	2
11	2
12	1
13	11
14	12
15	13
16	1
17	14
18	2
19	1
20	5
21	3
22	16
23	17
24	6
25	19
26	4
27	1
28	22
29	22
30	23
31	2
32	2
33	10
34	2
35	1
36	31
37	34
38	34
39	2
40	1
41	5
42	7
43	36
44	37
45	2
46	1
47	13
48	8
49	8
50	1
51	14
52	9
53	2
54	46
55	47
56	16
57	3
58	4
59	56
60	3
61	2
62	58
63	20
64	12
65	2
66	3
67	2
68	23
69	10
70	2
71	24
72	73
73	5
74	4
75	2
76	16
77	2
78	4
79	8
80	8
81	19
82	98
83	20
84	2
85	2
86	4
87	24
88	11
89	122
90	4
91	4
92	142
93	26
94	68
95	242
96	278
97	22
98	32

n	a(n)
1	3
2	4
3	5
4	1
5	6
6	2
7	1
8	8
9	3
10	2
11	2
12	1
13	11
14	12
15	13
16	1
17	14
18	2
19	1
20	5
21	3
22	16
23	17
24	6
25	19
26	4
27	1
28	22
29	22
30	23
31	2
32	2
33	10
34	2
35	1
36	31
37	34
38	34
39	2
40	1
41	5
42	7
43	36
44	37
45	2
46	1
47	13
48	8
49	8
50	1
51	14
52	9
53	2
54	46
55	47
56	16
57	3
58	4
59	56
60	3
61	2
62	58
63	20
64	12
65	2
66	3
67	2
68	23
69	10
70	2
71	24
72	73
73	5
74	4
75	2
76	16
77	2
78	4
79	8
80	8
81	19
82	98
83	20
84	2
85	2
86	4
87	24
88	11
89	122
90	4
91	4
92	142
93	26
94	68
95	242
96	278
97	22
98	32