A051996 - cp's OEIS frontend

A051996 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 k.

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

[1, -1, 1, 5, -1, 3, -7, 1, -3, -5, 5, -11, 1, -1, 1, 13, -1, 7, -15, -3, 5, -1, 1, 3, 1, -5, 21, -1, 1, 1, -13, -15, 3, 15, -31, 1, -1, 1, 17, -35, -7, 5, -1, 1, 19, -39, -3, -5, 5, 41, 3, 5, -23, 1, 1, -3, 17, 13, -1, -19, -29, 1, -3, 5, -31, 21, 33, -3, -7, 35, 3, 1, -15, -19, -39, 5, 41, -21, -11, 11, 5, 1, 5, -55, 55, 29, 5, -11, 1, -35, 35, 1, -7, -3, 1, 1, -15, 21]

cp's OEIS Frontend

A051996 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 k.

Table of values

List of values

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

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

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