A337810 - cp's OEIS frontend

A337810 Numbers k such that the number of prime factors, counted with multiplicity, of 2^k - 1 is less than the corresponding count for 2^k + 1.

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	13
7	15
8	17
9	19
10	25
11	26
12	27
13	31
14	33
15	34
16	35
17	37
18	38
19	41
20	45
21	46
22	49
23	51
24	57
25	59
26	61
27	62
28	65
29	67
30	69
31	77
32	78
33	81
34	83
35	85
36	89
37	91
38	93
39	97
40	98
41	99
42	103
43	107
44	109
45	111
46	118
47	122
48	123
49	125
50	127
51	129
52	130
53	131
54	133
55	134
56	135
57	137
58	139
59	141
60	143
61	145
62	149

[1, 3, 5, 7, 9, 13, 15, 17, 19, 25, 26, 27, 31, 33, 34, 35, 37, 38, 41, 45, 46, 49, 51, 57, 59, 61, 62, 65, 67, 69, 77, 78, 81, 83, 85, 89, 91, 93, 97, 98, 99, 103, 107, 109, 111, 118, 122, 123, 125, 127, 129, 130, 131, 133, 134, 135, 137, 139, 141, 143, 145, 149]

cp's OEIS Frontend

A337810 Numbers k such that the number of prime factors, counted with multiplicity, of 2^k - 1 is less than the corresponding count for 2^k + 1.

Table of values

List of values

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	13
7	15
8	17
9	19
10	25
11	26
12	27
13	31
14	33
15	34
16	35
17	37
18	38
19	41
20	45
21	46
22	49
23	51
24	57
25	59
26	61
27	62
28	65
29	67
30	69
31	77
32	78
33	81
34	83
35	85
36	89
37	91
38	93
39	97
40	98
41	99
42	103
43	107
44	109
45	111
46	118
47	122
48	123
49	125
50	127
51	129
52	130
53	131
54	133
55	134
56	135
57	137
58	139
59	141
60	143
61	145
62	149

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	13
7	15
8	17
9	19
10	25
11	26
12	27
13	31
14	33
15	34
16	35
17	37
18	38
19	41
20	45
21	46
22	49
23	51
24	57
25	59
26	61
27	62
28	65
29	67
30	69
31	77
32	78
33	81
34	83
35	85
36	89
37	91
38	93
39	97
40	98
41	99
42	103
43	107
44	109
45	111
46	118
47	122
48	123
49	125
50	127
51	129
52	130
53	131
54	133
55	134
56	135
57	137
58	139
59	141
60	143
61	145
62	149

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	13
7	15
8	17
9	19
10	25
11	26
12	27
13	31
14	33
15	34
16	35
17	37
18	38
19	41
20	45
21	46
22	49
23	51
24	57
25	59
26	61
27	62
28	65
29	67
30	69
31	77
32	78
33	81
34	83
35	85
36	89
37	91
38	93
39	97
40	98
41	99
42	103
43	107
44	109
45	111
46	118
47	122
48	123
49	125
50	127
51	129
52	130
53	131
54	133
55	134
56	135
57	137
58	139
59	141
60	143
61	145
62	149