A215747 - cp's OEIS frontend

A215747 a(n) = (-2)^n mod n.

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

[0, 0, 1, 0, 3, 4, 5, 0, 1, 4, 9, 4, 11, 4, 7, 0, 15, 10, 17, 16, 13, 4, 21, 16, 18, 4, 1, 16, 27, 4, 29, 0, 25, 4, 17, 28, 35, 4, 31, 16, 39, 22, 41, 16, 28, 4, 45, 16, 19, 24, 43, 16, 51, 28, 12, 32, 49, 4, 57, 16, 59, 4, 55, 0, 33, 64, 65, 16, 61, 44, 69, 64, 71, 4, 7]

cp's OEIS Frontend

A215747 a(n) = (-2)^n mod n.

Table of values

List of values

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

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

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