A305531 - cp's OEIS frontend

A305531 Smallest k >= 1 such that (n-1)*n^k + 1 is prime.

n	a(n)
2	1
3	1
4	1
5	2
6	1
7	1
8	2
9	1
10	3
11	10
12	3
13	1
14	2
15	1
16	1
17	4
18	1
19	29
20	14
21	1
22	1
23	14
24	2
25	1
26	2
27	4
28	1
29	2
30	4
31	5
32	12
33	2
34	1
35	2
36	2
37	9
38	16
39	1
40	2
41	80
42	1
43	2
44	4
45	2
46	3
47	16
48	2
49	2
50	2
51	1
52	15
53	960
54	15
55	1
56	4
57	3
58	1
59	14
60	1
61	6
62	20
63	1
64	3
65	946
66	6
67	1
68	18
69	10
70	1
71	4
72	1
73	5
74	42
75	4
76	1
77	828
78	1
79	1
80	2
81	1
82	12
83	2
84	6
85	4
86	30
87	3
88	3022
89	2
90	1
91	1

[1, 1, 1, 2, 1, 1, 2, 1, 3, 10, 3, 1, 2, 1, 1, 4, 1, 29, 14, 1, 1, 14, 2, 1, 2, 4, 1, 2, 4, 5, 12, 2, 1, 2, 2, 9, 16, 1, 2, 80, 1, 2, 4, 2, 3, 16, 2, 2, 2, 1, 15, 960, 15, 1, 4, 3, 1, 14, 1, 6, 20, 1, 3, 946, 6, 1, 18, 10, 1, 4, 1, 5, 42, 4, 1, 828, 1, 1, 2, 1, 12, 2, 6, 4, 30, 3, 3022, 2, 1, 1]

cp's OEIS Frontend

A305531 Smallest k >= 1 such that (n-1)*n^k + 1 is prime.

Table of values

List of values