A217377 - cp's OEIS frontend

A217377 a(n) is the smallest m>=0 such that ((5n+1)*6^m-1)/5 is prime; or -1 if no such value exists.

n	a(n)
1	1
2	0
3	0
4	2
5	0
6	1
7	0
8	4
9	2
10	1
11	0
12	1
13	0
14	3
15	2
16	1
17	0
18	1
19	0
20	2
21	1
22	4
23	0
24	3
25	1
26	1
27	1
28	3
29	0
30	1
31	0
32	1
33	1
34	2
35	1
36	2
37	0
38	1
39	3
40	1
41	0
42	15
43	0
44	3
45	1
46	1
47	0
48	4
49	3
50	3008
51	1
52	1
53	0
54	2
55	1
56	1
57	4
58	1
59	0
60	3
61	0
62	1
63	1
64	2
65	2
66	1
67	0
68	1
69	3
70	1
71	0
72	1
73	0
74	2
75	2
76	1
77	1
78	4
79	0
80	2
81	1
82	4
83	0
84	5
85	2
86	8

[1, 0, 0, 2, 0, 1, 0, 4, 2, 1, 0, 1, 0, 3, 2, 1, 0, 1, 0, 2, 1, 4, 0, 3, 1, 1, 1, 3, 0, 1, 0, 1, 1, 2, 1, 2, 0, 1, 3, 1, 0, 15, 0, 3, 1, 1, 0, 4, 3, 3008, 1, 1, 0, 2, 1, 1, 4, 1, 0, 3, 0, 1, 1, 2, 2, 1, 0, 1, 3, 1, 0, 1, 0, 2, 2, 1, 1, 4, 0, 2, 1, 4, 0, 5, 2, 8]

cp's OEIS Frontend

A217377 a(n) is the smallest m>=0 such that ((5n+1)*6^m-1)/5 is prime; or -1 if no such value exists.

Table of values

List of values