A089003 - cp's OEIS frontend

A089003 Number of non-congruent solutions to x^2 - 2y^2 == 1 (mod n).

n	a(n)
1	1
2	2
3	4
4	4
5	6
6	8
7	6
8	16
9	12
10	12
11	12
12	16
13	14
14	12
15	24
16	32
17	16
18	24
19	20
20	24
21	24
22	24
23	22
24	64
25	30
26	28
27	36
28	24
29	30
30	48
31	30
32	64
33	48
34	32
35	36
36	48
37	38
38	40
39	56
40	96
41	40
42	48
43	44
44	48
45	72
46	44
47	46
48	128
49	42
50	60
51	64
52	56
53	54
54	72
55	72
56	96
57	80
58	60
59	60
60	96
61	62
62	60
63	72
64	128
65	84
66	96
67	68
68	64
69	88
70	72

[1, 2, 4, 4, 6, 8, 6, 16, 12, 12, 12, 16, 14, 12, 24, 32, 16, 24, 20, 24, 24, 24, 22, 64, 30, 28, 36, 24, 30, 48, 30, 64, 48, 32, 36, 48, 38, 40, 56, 96, 40, 48, 44, 48, 72, 44, 46, 128, 42, 60, 64, 56, 54, 72, 72, 96, 80, 60, 60, 96, 62, 60, 72, 128, 84, 96, 68, 64, 88, 72]

cp's OEIS Frontend

A089003 Number of non-congruent solutions to x^2 - 2y^2 == 1 (mod n).

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	4
5	6
6	8
7	6
8	16
9	12
10	12
11	12
12	16
13	14
14	12
15	24
16	32
17	16
18	24
19	20
20	24
21	24
22	24
23	22
24	64
25	30
26	28
27	36
28	24
29	30
30	48
31	30
32	64
33	48
34	32
35	36
36	48
37	38
38	40
39	56
40	96
41	40
42	48
43	44
44	48
45	72
46	44
47	46
48	128
49	42
50	60
51	64
52	56
53	54
54	72
55	72
56	96
57	80
58	60
59	60
60	96
61	62
62	60
63	72
64	128
65	84
66	96
67	68
68	64
69	88
70	72

n	a(n)
1	1
2	2
3	4
4	4
5	6
6	8
7	6
8	16
9	12
10	12
11	12
12	16
13	14
14	12
15	24
16	32
17	16
18	24
19	20
20	24
21	24
22	24
23	22
24	64
25	30
26	28
27	36
28	24
29	30
30	48
31	30
32	64
33	48
34	32
35	36
36	48
37	38
38	40
39	56
40	96
41	40
42	48
43	44
44	48
45	72
46	44
47	46
48	128
49	42
50	60
51	64
52	56
53	54
54	72
55	72
56	96
57	80
58	60
59	60
60	96
61	62
62	60
63	72
64	128
65	84
66	96
67	68
68	64
69	88
70	72

n	a(n)
1	1
2	2
3	4
4	4
5	6
6	8
7	6
8	16
9	12
10	12
11	12
12	16
13	14
14	12
15	24
16	32
17	16
18	24
19	20
20	24
21	24
22	24
23	22
24	64
25	30
26	28
27	36
28	24
29	30
30	48
31	30
32	64
33	48
34	32
35	36
36	48
37	38
38	40
39	56
40	96
41	40
42	48
43	44
44	48
45	72
46	44
47	46
48	128
49	42
50	60
51	64
52	56
53	54
54	72
55	72
56	96
57	80
58	60
59	60
60	96
61	62
62	60
63	72
64	128
65	84
66	96
67	68
68	64
69	88
70	72