A232550 - cp's OEIS frontend

A232550 Number of distinct primitive quadratic forms of discriminant = -4n that exist such that every prime p for which p is a quadratic residue (mod 4n) or p-n is a quadratic residue (mod 4n) can be represented by one of them.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	2
12	1
13	1
14	2
15	1
16	1
17	2
18	1
19	2
20	2
21	1
22	1
23	2
24	1
25	1
26	2
27	2
28	1
29	2
30	1
31	2
32	2
33	1
34	2
35	2
36	2
37	1
38	2
39	2
40	1
41	3
42	1
43	2
44	2
45	1
46	2
47	3
48	1
49	2
50	2
51	2
52	2
53	2
54	2
55	2
56	2
57	1
58	1
59	5
60	1
61	2
62	3
63	2
64	2
65	2
66	2
67	2
68	3
69	2
70	1
71	4
72	1
73	2
74	3
75	2
76	2
77	2
78	1
79	3
80	2
81	2
82	2
83	5
84	2
85	1
86	3
87	2
88	1
89	4
90	2
91	2
92	2
93	1
94	3
95	3
96	2
97	2
98	3
99	2
100	2

[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 2, 1, 1, 2, 1, 2, 2, 1, 1, 2, 1, 1, 2, 2, 1, 2, 1, 2, 2, 1, 2, 2, 2, 1, 2, 2, 1, 3, 1, 2, 2, 1, 2, 3, 1, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 5, 1, 2, 3, 2, 2, 2, 2, 2, 3, 2, 1, 4, 1, 2, 3, 2, 2, 2, 1, 3, 2, 2, 2, 5, 2, 1, 3, 2, 1, 4, 2, 2, 2, 1, 3, 3, 2, 2, 3, 2, 2]

cp's OEIS Frontend

A232550 Number of distinct primitive quadratic forms of discriminant = -4n that exist such that every prime p for which p is a quadratic residue (mod 4n) or p-n is a quadratic residue (mod 4n) can be represented by one of them.

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	1
10	1
11	2
12	1
13	1
14	2
15	1
16	1
17	2
18	1
19	2
20	2
21	1
22	1
23	2
24	1
25	1
26	2
27	2
28	1
29	2
30	1
31	2
32	2
33	1
34	2
35	2
36	2
37	1
38	2
39	2
40	1
41	3
42	1
43	2
44	2
45	1
46	2
47	3
48	1
49	2
50	2
51	2
52	2
53	2
54	2
55	2
56	2
57	1
58	1
59	5
60	1
61	2
62	3
63	2
64	2
65	2
66	2
67	2
68	3
69	2
70	1
71	4
72	1
73	2
74	3
75	2
76	2
77	2
78	1
79	3
80	2
81	2
82	2
83	5
84	2
85	1
86	3
87	2
88	1
89	4
90	2
91	2
92	2
93	1
94	3
95	3
96	2
97	2
98	3
99	2
100	2

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	2
12	1
13	1
14	2
15	1
16	1
17	2
18	1
19	2
20	2
21	1
22	1
23	2
24	1
25	1
26	2
27	2
28	1
29	2
30	1
31	2
32	2
33	1
34	2
35	2
36	2
37	1
38	2
39	2
40	1
41	3
42	1
43	2
44	2
45	1
46	2
47	3
48	1
49	2
50	2
51	2
52	2
53	2
54	2
55	2
56	2
57	1
58	1
59	5
60	1
61	2
62	3
63	2
64	2
65	2
66	2
67	2
68	3
69	2
70	1
71	4
72	1
73	2
74	3
75	2
76	2
77	2
78	1
79	3
80	2
81	2
82	2
83	5
84	2
85	1
86	3
87	2
88	1
89	4
90	2
91	2
92	2
93	1
94	3
95	3
96	2
97	2
98	3
99	2
100	2

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	2
12	1
13	1
14	2
15	1
16	1
17	2
18	1
19	2
20	2
21	1
22	1
23	2
24	1
25	1
26	2
27	2
28	1
29	2
30	1
31	2
32	2
33	1
34	2
35	2
36	2
37	1
38	2
39	2
40	1
41	3
42	1
43	2
44	2
45	1
46	2
47	3
48	1
49	2
50	2
51	2
52	2
53	2
54	2
55	2
56	2
57	1
58	1
59	5
60	1
61	2
62	3
63	2
64	2
65	2
66	2
67	2
68	3
69	2
70	1
71	4
72	1
73	2
74	3
75	2
76	2
77	2
78	1
79	3
80	2
81	2
82	2
83	5
84	2
85	1
86	3
87	2
88	1
89	4
90	2
91	2
92	2
93	1
94	3
95	3
96	2
97	2
98	3
99	2
100	2