A258187 - cp's OEIS frontend

A258187 Numbers m such that either m^k - 1 or m^k - 2 is prime for some positive k, but not both.

n	a(n)
1	3
2	4
3	5
4	6
5	7
6	8
7	9
8	11
9	12
10	13
11	14
12	15
13	17
14	18
15	19
16	20
17	21
18	23
19	24
20	25
21	27
22	29
23	30
24	31
25	32
26	33
27	35
28	37
29	38
30	39
31	41
32	42
33	43
34	44
35	45
36	47
37	48
38	49
39	51
40	53
41	54
42	55
43	57
44	59
45	60
46	61
47	62
48	63
49	65
50	67
51	68
52	69
53	71
54	72
55	73
56	74
57	75
58	77
59	79
60	80
61	81
62	83
63	84
64	85
65	87
66	89
67	90
68	91
69	93
70	95
71	97
72	98
73	99
74	101

[3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 23, 24, 25, 27, 29, 30, 31, 32, 33, 35, 37, 38, 39, 41, 42, 43, 44, 45, 47, 48, 49, 51, 53, 54, 55, 57, 59, 60, 61, 62, 63, 65, 67, 68, 69, 71, 72, 73, 74, 75, 77, 79, 80, 81, 83, 84, 85, 87, 89, 90, 91, 93, 95, 97, 98, 99, 101]

cp's OEIS Frontend

A258187 Numbers m such that either m^k - 1 or m^k - 2 is prime for some positive k, but not both.

Table of values

List of values

n	a(n)
1	3
2	4
3	5
4	6
5	7
6	8
7	9
8	11
9	12
10	13
11	14
12	15
13	17
14	18
15	19
16	20
17	21
18	23
19	24
20	25
21	27
22	29
23	30
24	31
25	32
26	33
27	35
28	37
29	38
30	39
31	41
32	42
33	43
34	44
35	45
36	47
37	48
38	49
39	51
40	53
41	54
42	55
43	57
44	59
45	60
46	61
47	62
48	63
49	65
50	67
51	68
52	69
53	71
54	72
55	73
56	74
57	75
58	77
59	79
60	80
61	81
62	83
63	84
64	85
65	87
66	89
67	90
68	91
69	93
70	95
71	97
72	98
73	99
74	101

n	a(n)
1	3
2	4
3	5
4	6
5	7
6	8
7	9
8	11
9	12
10	13
11	14
12	15
13	17
14	18
15	19
16	20
17	21
18	23
19	24
20	25
21	27
22	29
23	30
24	31
25	32
26	33
27	35
28	37
29	38
30	39
31	41
32	42
33	43
34	44
35	45
36	47
37	48
38	49
39	51
40	53
41	54
42	55
43	57
44	59
45	60
46	61
47	62
48	63
49	65
50	67
51	68
52	69
53	71
54	72
55	73
56	74
57	75
58	77
59	79
60	80
61	81
62	83
63	84
64	85
65	87
66	89
67	90
68	91
69	93
70	95
71	97
72	98
73	99
74	101

n	a(n)
1	3
2	4
3	5
4	6
5	7
6	8
7	9
8	11
9	12
10	13
11	14
12	15
13	17
14	18
15	19
16	20
17	21
18	23
19	24
20	25
21	27
22	29
23	30
24	31
25	32
26	33
27	35
28	37
29	38
30	39
31	41
32	42
33	43
34	44
35	45
36	47
37	48
38	49
39	51
40	53
41	54
42	55
43	57
44	59
45	60
46	61
47	62
48	63
49	65
50	67
51	68
52	69
53	71
54	72
55	73
56	74
57	75
58	77
59	79
60	80
61	81
62	83
63	84
64	85
65	87
66	89
67	90
68	91
69	93
70	95
71	97
72	98
73	99
74	101