A138067 - cp's OEIS frontend

A138067 Least k > 1 such that (2n-1)^k + 2 is prime, or 0 if no such number exists.

n	a(n)
1	2
2	2
3	3
4	0
5	2
6	5
7	0
8	2
9	105
10	0
11	2
12	11
13	0
14	5
15	3
16	0
17	2
18	15
19	0
20	2
21	9
22	0
23	2
24	113
25	0
26	5
27	7
28	0
29	2
30	27
31	0
32	3
33	3
34	0
35	3
36	3
37	0
38	12
39	61
40	0
41	2
42	3
43	0
44	4
45	255
46	0
47	8
48	63
49	0
50	2
51	9
52	0
53	2
54	3473
55	0
56	2
57	3
58	0
59	2
60	15
61	0
62	2
63	87
64	0
65	3
66	23
67	0
68	36
69	1861
70	0
71	4
72	3
73	0
74	2
75	5
76	0
77	3
78	7
79	0
80	136
81	425
82	0
83	11

[2, 2, 3, 0, 2, 5, 0, 2, 105, 0, 2, 11, 0, 5, 3, 0, 2, 15, 0, 2, 9, 0, 2, 113, 0, 5, 7, 0, 2, 27, 0, 3, 3, 0, 3, 3, 0, 12, 61, 0, 2, 3, 0, 4, 255, 0, 8, 63, 0, 2, 9, 0, 2, 3473, 0, 2, 3, 0, 2, 15, 0, 2, 87, 0, 3, 23, 0, 36, 1861, 0, 4, 3, 0, 2, 5, 0, 3, 7, 0, 136, 425, 0, 11]

cp's OEIS Frontend

A138067 Least k > 1 such that (2n-1)^k + 2 is prime, or 0 if no such number exists.

Table of values

List of values