A086932 - cp's OEIS frontend

A086932 Number of non-congruent solutions of x^2 + y^2 == -1 (mod n).

n	a(n)
1	1
2	2
3	4
4	0
5	4
6	8
7	8
8	0
9	12
10	8
11	12
12	0
13	12
14	16
15	16
16	0
17	16
18	24
19	20
20	0
21	32
22	24
23	24
24	0
25	20
26	24
27	36
28	0
29	28
30	32
31	32
32	0
33	48
34	32
35	32
36	0
37	36
38	40
39	48
40	0
41	40
42	64
43	44
44	0
45	48
46	48
47	48
48	0
49	56
50	40
51	64
52	0
53	52
54	72
55	48
56	0
57	80
58	56
59	60
60	0
61	60
62	64
63	96
64	0
65	48
66	96
67	68
68	0
69	96
70	64
71	72
72	0
73	72
74	72
75	80
76	0
77	96
78	96

[1, 2, 4, 0, 4, 8, 8, 0, 12, 8, 12, 0, 12, 16, 16, 0, 16, 24, 20, 0, 32, 24, 24, 0, 20, 24, 36, 0, 28, 32, 32, 0, 48, 32, 32, 0, 36, 40, 48, 0, 40, 64, 44, 0, 48, 48, 48, 0, 56, 40, 64, 0, 52, 72, 48, 0, 80, 56, 60, 0, 60, 64, 96, 0, 48, 96, 68, 0, 96, 64, 72, 0, 72, 72, 80, 0, 96, 96]

cp's OEIS Frontend

A086932 Number of non-congruent solutions of x^2 + y^2 == -1 (mod n).

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	0
5	4
6	8
7	8
8	0
9	12
10	8
11	12
12	0
13	12
14	16
15	16
16	0
17	16
18	24
19	20
20	0
21	32
22	24
23	24
24	0
25	20
26	24
27	36
28	0
29	28
30	32
31	32
32	0
33	48
34	32
35	32
36	0
37	36
38	40
39	48
40	0
41	40
42	64
43	44
44	0
45	48
46	48
47	48
48	0
49	56
50	40
51	64
52	0
53	52
54	72
55	48
56	0
57	80
58	56
59	60
60	0
61	60
62	64
63	96
64	0
65	48
66	96
67	68
68	0
69	96
70	64
71	72
72	0
73	72
74	72
75	80
76	0
77	96
78	96

n	a(n)
1	1
2	2
3	4
4	0
5	4
6	8
7	8
8	0
9	12
10	8
11	12
12	0
13	12
14	16
15	16
16	0
17	16
18	24
19	20
20	0
21	32
22	24
23	24
24	0
25	20
26	24
27	36
28	0
29	28
30	32
31	32
32	0
33	48
34	32
35	32
36	0
37	36
38	40
39	48
40	0
41	40
42	64
43	44
44	0
45	48
46	48
47	48
48	0
49	56
50	40
51	64
52	0
53	52
54	72
55	48
56	0
57	80
58	56
59	60
60	0
61	60
62	64
63	96
64	0
65	48
66	96
67	68
68	0
69	96
70	64
71	72
72	0
73	72
74	72
75	80
76	0
77	96
78	96

n	a(n)
1	1
2	2
3	4
4	0
5	4
6	8
7	8
8	0
9	12
10	8
11	12
12	0
13	12
14	16
15	16
16	0
17	16
18	24
19	20
20	0
21	32
22	24
23	24
24	0
25	20
26	24
27	36
28	0
29	28
30	32
31	32
32	0
33	48
34	32
35	32
36	0
37	36
38	40
39	48
40	0
41	40
42	64
43	44
44	0
45	48
46	48
47	48
48	0
49	56
50	40
51	64
52	0
53	52
54	72
55	48
56	0
57	80
58	56
59	60
60	0
61	60
62	64
63	96
64	0
65	48
66	96
67	68
68	0
69	96
70	64
71	72
72	0
73	72
74	72
75	80
76	0
77	96
78	96