A239938 - cp's OEIS frontend

A239938 a(n) = least number k > 0 such that n*k^n - 1 is prime, or 0 if no such k exists.

n	a(n)
1	3
2	2
3	1
4	1
5	4
6	1
7	8
8	1
9	40
10	3
11	10
12	1
13	56
14	1
15	10
16	0
17	46
18	1
19	6
20	1
21	42
22	51
23	4
24	1
25	8
26	67
27	0
28	18
29	102
30	1
31	98
32	1
33	38
34	6
35	136
36	0
37	90
38	1
39	10
40	3
41	52
42	1
43	12
44	1
45	18
46	3
47	28
48	1
49	72
50	165
51	40
52	657
53	418
54	1
55	44
56	205
57	94
58	9
59	426
60	1
61	482
62	1
63	4
64	0
65	418
66	252
67	38
68	1
69	400
70	165
71	28
72	1
73	140

[3, 2, 1, 1, 4, 1, 8, 1, 40, 3, 10, 1, 56, 1, 10, 0, 46, 1, 6, 1, 42, 51, 4, 1, 8, 67, 0, 18, 102, 1, 98, 1, 38, 6, 136, 0, 90, 1, 10, 3, 52, 1, 12, 1, 18, 3, 28, 1, 72, 165, 40, 657, 418, 1, 44, 205, 94, 9, 426, 1, 482, 1, 4, 0, 418, 252, 38, 1, 400, 165, 28, 1, 140]

cp's OEIS Frontend

A239938 a(n) = least number k > 0 such that n*k^n - 1 is prime, or 0 if no such k exists.

Table of values

List of values

n	a(n)
1	3
2	2
3	1
4	1
5	4
6	1
7	8
8	1
9	40
10	3
11	10
12	1
13	56
14	1
15	10
16	0
17	46
18	1
19	6
20	1
21	42
22	51
23	4
24	1
25	8
26	67
27	0
28	18
29	102
30	1
31	98
32	1
33	38
34	6
35	136
36	0
37	90
38	1
39	10
40	3
41	52
42	1
43	12
44	1
45	18
46	3
47	28
48	1
49	72
50	165
51	40
52	657
53	418
54	1
55	44
56	205
57	94
58	9
59	426
60	1
61	482
62	1
63	4
64	0
65	418
66	252
67	38
68	1
69	400
70	165
71	28
72	1
73	140

n	a(n)
1	3
2	2
3	1
4	1
5	4
6	1
7	8
8	1
9	40
10	3
11	10
12	1
13	56
14	1
15	10
16	0
17	46
18	1
19	6
20	1
21	42
22	51
23	4
24	1
25	8
26	67
27	0
28	18
29	102
30	1
31	98
32	1
33	38
34	6
35	136
36	0
37	90
38	1
39	10
40	3
41	52
42	1
43	12
44	1
45	18
46	3
47	28
48	1
49	72
50	165
51	40
52	657
53	418
54	1
55	44
56	205
57	94
58	9
59	426
60	1
61	482
62	1
63	4
64	0
65	418
66	252
67	38
68	1
69	400
70	165
71	28
72	1
73	140

n	a(n)
1	3
2	2
3	1
4	1
5	4
6	1
7	8
8	1
9	40
10	3
11	10
12	1
13	56
14	1
15	10
16	0
17	46
18	1
19	6
20	1
21	42
22	51
23	4
24	1
25	8
26	67
27	0
28	18
29	102
30	1
31	98
32	1
33	38
34	6
35	136
36	0
37	90
38	1
39	10
40	3
41	52
42	1
43	12
44	1
45	18
46	3
47	28
48	1
49	72
50	165
51	40
52	657
53	418
54	1
55	44
56	205
57	94
58	9
59	426
60	1
61	482
62	1
63	4
64	0
65	418
66	252
67	38
68	1
69	400
70	165
71	28
72	1
73	140