A337813 - cp's OEIS frontend

A337813 Numbers k such that the number of distinct prime factors of 2^k - 1 is greater than the corresponding count for 2^k + 1.

n	a(n)
1	4
2	8
3	10
4	12
5	16
6	20
7	22
8	24
9	28
10	30
11	32
12	36
13	39
14	40
15	43
16	44
17	45
18	48
19	50
20	52
21	55
22	56
23	58
24	60
25	63
26	64
27	66
28	68
29	70
30	72
31	75
32	76
33	79
34	80
35	84
36	87
37	88
38	90
39	92
40	94
41	96
42	99
43	100
44	102
45	104
46	106
47	108
48	110
49	112
50	116
51	117
52	119
53	120
54	124
55	126
56	128
57	132
58	135
59	136
60	140
61	144

[4, 8, 10, 12, 16, 20, 22, 24, 28, 30, 32, 36, 39, 40, 43, 44, 45, 48, 50, 52, 55, 56, 58, 60, 63, 64, 66, 68, 70, 72, 75, 76, 79, 80, 84, 87, 88, 90, 92, 94, 96, 99, 100, 102, 104, 106, 108, 110, 112, 116, 117, 119, 120, 124, 126, 128, 132, 135, 136, 140, 144]

cp's OEIS Frontend

A337813 Numbers k such that the number of distinct prime factors of 2^k - 1 is greater than the corresponding count for 2^k + 1.

Table of values

List of values

n	a(n)
1	4
2	8
3	10
4	12
5	16
6	20
7	22
8	24
9	28
10	30
11	32
12	36
13	39
14	40
15	43
16	44
17	45
18	48
19	50
20	52
21	55
22	56
23	58
24	60
25	63
26	64
27	66
28	68
29	70
30	72
31	75
32	76
33	79
34	80
35	84
36	87
37	88
38	90
39	92
40	94
41	96
42	99
43	100
44	102
45	104
46	106
47	108
48	110
49	112
50	116
51	117
52	119
53	120
54	124
55	126
56	128
57	132
58	135
59	136
60	140
61	144

n	a(n)
1	4
2	8
3	10
4	12
5	16
6	20
7	22
8	24
9	28
10	30
11	32
12	36
13	39
14	40
15	43
16	44
17	45
18	48
19	50
20	52
21	55
22	56
23	58
24	60
25	63
26	64
27	66
28	68
29	70
30	72
31	75
32	76
33	79
34	80
35	84
36	87
37	88
38	90
39	92
40	94
41	96
42	99
43	100
44	102
45	104
46	106
47	108
48	110
49	112
50	116
51	117
52	119
53	120
54	124
55	126
56	128
57	132
58	135
59	136
60	140
61	144

n	a(n)
1	4
2	8
3	10
4	12
5	16
6	20
7	22
8	24
9	28
10	30
11	32
12	36
13	39
14	40
15	43
16	44
17	45
18	48
19	50
20	52
21	55
22	56
23	58
24	60
25	63
26	64
27	66
28	68
29	70
30	72
31	75
32	76
33	79
34	80
35	84
36	87
37	88
38	90
39	92
40	94
41	96
42	99
43	100
44	102
45	104
46	106
47	108
48	110
49	112
50	116
51	117
52	119
53	120
54	124
55	126
56	128
57	132
58	135
59	136
60	140
61	144