A125973 - cp's OEIS frontend

A125973 Smallest k such that k^n + k^(n-1) - 1 is prime.

n	a(n)
1	2
2	2
3	2
4	2
5	2
6	3
7	2
8	2
9	14
10	4
11	7
12	2
13	38
14	6
15	7
16	3
17	4
18	10
19	2
20	9
21	74
22	6
23	10
24	7
25	4
26	61
27	20
28	4
29	5
30	9
31	6
32	16
33	6
34	8
35	2
36	9
37	4
38	10
39	2
40	48
41	44
42	163
43	9
44	2
45	95
46	3
47	27
48	70
49	6
50	26
51	57
52	9
53	6
54	8
55	207
56	2
57	27
58	15
59	45
60	7
61	69
62	199
63	55
64	16
65	2
66	5
67	12
68	43
69	137
70	39
71	9
72	57
73	5
74	20
75	4
76	115
77	2
78	103
79	45
80	15
81	20
82	109

[2, 2, 2, 2, 2, 3, 2, 2, 14, 4, 7, 2, 38, 6, 7, 3, 4, 10, 2, 9, 74, 6, 10, 7, 4, 61, 20, 4, 5, 9, 6, 16, 6, 8, 2, 9, 4, 10, 2, 48, 44, 163, 9, 2, 95, 3, 27, 70, 6, 26, 57, 9, 6, 8, 207, 2, 27, 15, 45, 7, 69, 199, 55, 16, 2, 5, 12, 43, 137, 39, 9, 57, 5, 20, 4, 115, 2, 103, 45, 15, 20, 109]

cp's OEIS Frontend

A125973 Smallest k such that k^n + k^(n-1) - 1 is prime.

Table of values

List of values

n	a(n)
1	2
2	2
3	2
4	2
5	2
6	3
7	2
8	2
9	14
10	4
11	7
12	2
13	38
14	6
15	7
16	3
17	4
18	10
19	2
20	9
21	74
22	6
23	10
24	7
25	4
26	61
27	20
28	4
29	5
30	9
31	6
32	16
33	6
34	8
35	2
36	9
37	4
38	10
39	2
40	48
41	44
42	163
43	9
44	2
45	95
46	3
47	27
48	70
49	6
50	26
51	57
52	9
53	6
54	8
55	207
56	2
57	27
58	15
59	45
60	7
61	69
62	199
63	55
64	16
65	2
66	5
67	12
68	43
69	137
70	39
71	9
72	57
73	5
74	20
75	4
76	115
77	2
78	103
79	45
80	15
81	20
82	109

n	a(n)
1	2
2	2
3	2
4	2
5	2
6	3
7	2
8	2
9	14
10	4
11	7
12	2
13	38
14	6
15	7
16	3
17	4
18	10
19	2
20	9
21	74
22	6
23	10
24	7
25	4
26	61
27	20
28	4
29	5
30	9
31	6
32	16
33	6
34	8
35	2
36	9
37	4
38	10
39	2
40	48
41	44
42	163
43	9
44	2
45	95
46	3
47	27
48	70
49	6
50	26
51	57
52	9
53	6
54	8
55	207
56	2
57	27
58	15
59	45
60	7
61	69
62	199
63	55
64	16
65	2
66	5
67	12
68	43
69	137
70	39
71	9
72	57
73	5
74	20
75	4
76	115
77	2
78	103
79	45
80	15
81	20
82	109

n	a(n)
1	2
2	2
3	2
4	2
5	2
6	3
7	2
8	2
9	14
10	4
11	7
12	2
13	38
14	6
15	7
16	3
17	4
18	10
19	2
20	9
21	74
22	6
23	10
24	7
25	4
26	61
27	20
28	4
29	5
30	9
31	6
32	16
33	6
34	8
35	2
36	9
37	4
38	10
39	2
40	48
41	44
42	163
43	9
44	2
45	95
46	3
47	27
48	70
49	6
50	26
51	57
52	9
53	6
54	8
55	207
56	2
57	27
58	15
59	45
60	7
61	69
62	199
63	55
64	16
65	2
66	5
67	12
68	43
69	137
70	39
71	9
72	57
73	5
74	20
75	4
76	115
77	2
78	103
79	45
80	15
81	20
82	109