A265166 - cp's OEIS frontend

A265166 Numbers n such that 2^n-1 and 5^n-1 are coprime.

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	11
7	13
8	17
9	19
10	21
11	23
12	25
13	27
14	29
15	31
16	33
17	37
18	41
19	43
20	47
21	49
22	51
23	53
24	55
25	57
26	59
27	61
28	63
29	65
30	67
31	69
32	71
33	73
34	77
35	79
36	81
37	83
38	85
39	87
40	89
41	91
42	93
43	97
44	101
45	103
46	107
47	109
48	111
49	113
50	115
51	121
52	123
53	125
54	127
55	129
56	131
57	133
58	137
59	139
60	141
61	143

[1, 3, 5, 7, 9, 11, 13, 17, 19, 21, 23, 25, 27, 29, 31, 33, 37, 41, 43, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 77, 79, 81, 83, 85, 87, 89, 91, 93, 97, 101, 103, 107, 109, 111, 113, 115, 121, 123, 125, 127, 129, 131, 133, 137, 139, 141, 143]

cp's OEIS Frontend

A265166 Numbers n such that 2^n-1 and 5^n-1 are coprime.

Table of values

List of values

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	11
7	13
8	17
9	19
10	21
11	23
12	25
13	27
14	29
15	31
16	33
17	37
18	41
19	43
20	47
21	49
22	51
23	53
24	55
25	57
26	59
27	61
28	63
29	65
30	67
31	69
32	71
33	73
34	77
35	79
36	81
37	83
38	85
39	87
40	89
41	91
42	93
43	97
44	101
45	103
46	107
47	109
48	111
49	113
50	115
51	121
52	123
53	125
54	127
55	129
56	131
57	133
58	137
59	139
60	141
61	143

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	11
7	13
8	17
9	19
10	21
11	23
12	25
13	27
14	29
15	31
16	33
17	37
18	41
19	43
20	47
21	49
22	51
23	53
24	55
25	57
26	59
27	61
28	63
29	65
30	67
31	69
32	71
33	73
34	77
35	79
36	81
37	83
38	85
39	87
40	89
41	91
42	93
43	97
44	101
45	103
46	107
47	109
48	111
49	113
50	115
51	121
52	123
53	125
54	127
55	129
56	131
57	133
58	137
59	139
60	141
61	143

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	11
7	13
8	17
9	19
10	21
11	23
12	25
13	27
14	29
15	31
16	33
17	37
18	41
19	43
20	47
21	49
22	51
23	53
24	55
25	57
26	59
27	61
28	63
29	65
30	67
31	69
32	71
33	73
34	77
35	79
36	81
37	83
38	85
39	87
40	89
41	91
42	93
43	97
44	101
45	103
46	107
47	109
48	111
49	113
50	115
51	121
52	123
53	125
54	127
55	129
56	131
57	133
58	137
59	139
60	141
61	143