A216506 - cp's OEIS frontend

A216506 Least number k such that k*n+1 is a prime dividing n^(2n) - 1.

n	a(n)
2	1
3	2
4	1
5	2
6	1
7	4
8	2
9	2
10	1
11	2
12	1
13	4
14	2
15	2
16	1
17	644
18	1
19	5700
20	2
21	2
22	1
23	2
24	3
25	4
26	2
27	4
28	1
29	2
30	1
31	12
32	8
33	2
34	3
35	2
36	1
37	4
38	5
39	2
40	1
41	2
42	1
43	4
44	2
45	4
46	1
47	14
48	2
49	4
50	2
51	2
52	1
53	2
54	2
55	16
56	2
57	4
58	1
59	12
60	1
61	16
62	273
63	2
64	3
65	2
66	1
67	4
68	2
69	2
70	1
71	246
72	1
73	4
74	2
75	2
76	16
77	8
78	1
79	4
80	15
81	2
82	1
83	2
84	4
85	12

[1, 2, 1, 2, 1, 4, 2, 2, 1, 2, 1, 4, 2, 2, 1, 644, 1, 5700, 2, 2, 1, 2, 3, 4, 2, 4, 1, 2, 1, 12, 8, 2, 3, 2, 1, 4, 5, 2, 1, 2, 1, 4, 2, 4, 1, 14, 2, 4, 2, 2, 1, 2, 2, 16, 2, 4, 1, 12, 1, 16, 273, 2, 3, 2, 1, 4, 2, 2, 1, 246, 1, 4, 2, 2, 16, 8, 1, 4, 15, 2, 1, 2, 4, 12]

cp's OEIS Frontend

A216506 Least number k such that k*n+1 is a prime dividing n^(2n) - 1.

Table of values

List of values