A240662 - cp's OEIS frontend

A240662 Least k such that 7^k == -1 (mod prime(n)), or 0 if no such k exists.

n	a(n)
1	1
2	0
3	2
4	0
5	5
6	6
7	8
8	0
9	11
10	0
11	0
12	0
13	20
14	3
15	0
16	13
17	0
18	30
19	33
20	35
21	12
22	39
23	0
24	44
25	48
26	50
27	0
28	53
29	0
30	7
31	63
32	0
33	34
34	0
35	37
36	75
37	26
38	81
39	0
40	86
41	89
42	6
43	5
44	12
45	49
46	0
47	105
48	0
49	0
50	114
51	58
52	119
53	120
54	0
55	128
56	131
57	134
58	0
59	69
60	10
61	0
62	146
63	0
64	0
65	52
66	79
67	55
68	28
69	173
70	174
71	16

[1, 0, 2, 0, 5, 6, 8, 0, 11, 0, 0, 0, 20, 3, 0, 13, 0, 30, 33, 35, 12, 39, 0, 44, 48, 50, 0, 53, 0, 7, 63, 0, 34, 0, 37, 75, 26, 81, 0, 86, 89, 6, 5, 12, 49, 0, 105, 0, 0, 114, 58, 119, 120, 0, 128, 131, 134, 0, 69, 10, 0, 146, 0, 0, 52, 79, 55, 28, 173, 174, 16]

cp's OEIS Frontend

A240662 Least k such that 7^k == -1 (mod prime(n)), or 0 if no such k exists.

Table of values

List of values

n	a(n)
1	1
2	0
3	2
4	0
5	5
6	6
7	8
8	0
9	11
10	0
11	0
12	0
13	20
14	3
15	0
16	13
17	0
18	30
19	33
20	35
21	12
22	39
23	0
24	44
25	48
26	50
27	0
28	53
29	0
30	7
31	63
32	0
33	34
34	0
35	37
36	75
37	26
38	81
39	0
40	86
41	89
42	6
43	5
44	12
45	49
46	0
47	105
48	0
49	0
50	114
51	58
52	119
53	120
54	0
55	128
56	131
57	134
58	0
59	69
60	10
61	0
62	146
63	0
64	0
65	52
66	79
67	55
68	28
69	173
70	174
71	16

n	a(n)
1	1
2	0
3	2
4	0
5	5
6	6
7	8
8	0
9	11
10	0
11	0
12	0
13	20
14	3
15	0
16	13
17	0
18	30
19	33
20	35
21	12
22	39
23	0
24	44
25	48
26	50
27	0
28	53
29	0
30	7
31	63
32	0
33	34
34	0
35	37
36	75
37	26
38	81
39	0
40	86
41	89
42	6
43	5
44	12
45	49
46	0
47	105
48	0
49	0
50	114
51	58
52	119
53	120
54	0
55	128
56	131
57	134
58	0
59	69
60	10
61	0
62	146
63	0
64	0
65	52
66	79
67	55
68	28
69	173
70	174
71	16

n	a(n)
1	1
2	0
3	2
4	0
5	5
6	6
7	8
8	0
9	11
10	0
11	0
12	0
13	20
14	3
15	0
16	13
17	0
18	30
19	33
20	35
21	12
22	39
23	0
24	44
25	48
26	50
27	0
28	53
29	0
30	7
31	63
32	0
33	34
34	0
35	37
36	75
37	26
38	81
39	0
40	86
41	89
42	6
43	5
44	12
45	49
46	0
47	105
48	0
49	0
50	114
51	58
52	119
53	120
54	0
55	128
56	131
57	134
58	0
59	69
60	10
61	0
62	146
63	0
64	0
65	52
66	79
67	55
68	28
69	173
70	174
71	16