A346149 - cp's OEIS frontend

A346149 a(n) is the least integer k > 1 such that n^k + n + 1 is prime, or 0 if there is no such k.

n	a(n)
1	2
2	2
3	2
4	0
5	2
6	2
7	0
8	2
9	3
10	0
11	4
12	2
13	0
14	2
15	2
16	0
17	2
18	3
19	0
20	2
21	2
22	0
23	9
24	2
25	0
26	4
27	2
28	0
29	3
30	3
31	0
32	3
33	2
34	0
35	15
36	4
37	0
38	2
39	3
40	0
41	2
42	3
43	0
44	3
45	6
46	0
47	4
48	3
49	0
50	2
51	9
52	0
53	3
54	2
55	0
56	3
57	2
58	0
59	2
60	3
61	0
62	2
63	73
64	0
65	12
66	2
67	0
68	595
69	2
70	0
71	2
72	4
73	0
74	3
75	2
76	0
77	2
78	2
79	0
80	2
81	7
82	0
83	3
84	30
85	0
86	21
87	3
88	0
89	2
90	2
91	0
92	7
93	67
94	0
95	3

[2, 2, 2, 0, 2, 2, 0, 2, 3, 0, 4, 2, 0, 2, 2, 0, 2, 3, 0, 2, 2, 0, 9, 2, 0, 4, 2, 0, 3, 3, 0, 3, 2, 0, 15, 4, 0, 2, 3, 0, 2, 3, 0, 3, 6, 0, 4, 3, 0, 2, 9, 0, 3, 2, 0, 3, 2, 0, 2, 3, 0, 2, 73, 0, 12, 2, 0, 595, 2, 0, 2, 4, 0, 3, 2, 0, 2, 2, 0, 2, 7, 0, 3, 30, 0, 21, 3, 0, 2, 2, 0, 7, 67, 0, 3]

cp's OEIS Frontend

A346149 a(n) is the least integer k > 1 such that n^k + n + 1 is prime, or 0 if there is no such k.

Table of values

List of values

n	a(n)
1	2
2	2
3	2
4	0
5	2
6	2
7	0
8	2
9	3
10	0
11	4
12	2
13	0
14	2
15	2
16	0
17	2
18	3
19	0
20	2
21	2
22	0
23	9
24	2
25	0
26	4
27	2
28	0
29	3
30	3
31	0
32	3
33	2
34	0
35	15
36	4
37	0
38	2
39	3
40	0
41	2
42	3
43	0
44	3
45	6
46	0
47	4
48	3
49	0
50	2
51	9
52	0
53	3
54	2
55	0
56	3
57	2
58	0
59	2
60	3
61	0
62	2
63	73
64	0
65	12
66	2
67	0
68	595
69	2
70	0
71	2
72	4
73	0
74	3
75	2
76	0
77	2
78	2
79	0
80	2
81	7
82	0
83	3
84	30
85	0
86	21
87	3
88	0
89	2
90	2
91	0
92	7
93	67
94	0
95	3

n	a(n)
1	2
2	2
3	2
4	0
5	2
6	2
7	0
8	2
9	3
10	0
11	4
12	2
13	0
14	2
15	2
16	0
17	2
18	3
19	0
20	2
21	2
22	0
23	9
24	2
25	0
26	4
27	2
28	0
29	3
30	3
31	0
32	3
33	2
34	0
35	15
36	4
37	0
38	2
39	3
40	0
41	2
42	3
43	0
44	3
45	6
46	0
47	4
48	3
49	0
50	2
51	9
52	0
53	3
54	2
55	0
56	3
57	2
58	0
59	2
60	3
61	0
62	2
63	73
64	0
65	12
66	2
67	0
68	595
69	2
70	0
71	2
72	4
73	0
74	3
75	2
76	0
77	2
78	2
79	0
80	2
81	7
82	0
83	3
84	30
85	0
86	21
87	3
88	0
89	2
90	2
91	0
92	7
93	67
94	0
95	3

n	a(n)
1	2
2	2
3	2
4	0
5	2
6	2
7	0
8	2
9	3
10	0
11	4
12	2
13	0
14	2
15	2
16	0
17	2
18	3
19	0
20	2
21	2
22	0
23	9
24	2
25	0
26	4
27	2
28	0
29	3
30	3
31	0
32	3
33	2
34	0
35	15
36	4
37	0
38	2
39	3
40	0
41	2
42	3
43	0
44	3
45	6
46	0
47	4
48	3
49	0
50	2
51	9
52	0
53	3
54	2
55	0
56	3
57	2
58	0
59	2
60	3
61	0
62	2
63	73
64	0
65	12
66	2
67	0
68	595
69	2
70	0
71	2
72	4
73	0
74	3
75	2
76	0
77	2
78	2
79	0
80	2
81	7
82	0
83	3
84	30
85	0
86	21
87	3
88	0
89	2
90	2
91	0
92	7
93	67
94	0
95	3