A234287 - cp's OEIS frontend

A234287 Number of distinct quadratic forms of discriminant -4n by which some prime can be represented.

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

[1, 1, 2, 2, 2, 2, 2, 3, 3, 2, 3, 3, 2, 3, 3, 3, 3, 3, 3, 4, 4, 2, 3, 5, 3, 4, 4, 3, 4, 4, 3, 4, 4, 3, 5, 5, 2, 4, 4, 5, 5, 4, 3, 5, 5, 3, 4, 5, 4, 5, 5, 4, 4, 5, 4, 7, 4, 2, 6, 5, 4, 5, 5, 4, 6, 6, 3, 6, 6, 4, 5, 6, 3, 6, 6, 5, 6, 4, 4, 7, 5, 3, 6, 7, 4, 6, 5, 5, 7, 7, 5, 5, 4, 5, 6, 7, 3, 6, 6, 5]

cp's OEIS Frontend

A234287 Number of distinct quadratic forms of discriminant -4n by which some prime can be represented.

Table of values

List of values

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

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

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