A255602 - cp's OEIS frontend

A255602 Numbers k which are odd and squarefree and have the property that k is either a prime number or for every prime p dividing k, p+1 is not divisible by any of the other prime factors of k.

n	a(n)
1	1
2	3
3	5
4	7
5	11
6	13
7	17
8	19
9	21
10	23
11	29
12	31
13	35
14	37
15	39
16	41
17	43
18	47
19	53
20	55
21	57
22	59
23	61
24	65
25	67
26	71
27	73
28	77
29	79
30	83
31	85
32	89
33	93
34	97
35	101
36	103
37	107
38	109
39	111
40	113
41	115
42	119
43	127
44	129
45	131
46	133
47	137
48	139
49	143
50	149
51	151
52	155

[1, 3, 5, 7, 11, 13, 17, 19, 21, 23, 29, 31, 35, 37, 39, 41, 43, 47, 53, 55, 57, 59, 61, 65, 67, 71, 73, 77, 79, 83, 85, 89, 93, 97, 101, 103, 107, 109, 111, 113, 115, 119, 127, 129, 131, 133, 137, 139, 143, 149, 151, 155]

cp's OEIS Frontend

A255602 Numbers k which are odd and squarefree and have the property that k is either a prime number or for every prime p dividing k, p+1 is not divisible by any of the other prime factors of k.

Table of values

List of values

n	a(n)
1	1
2	3
3	5
4	7
5	11
6	13
7	17
8	19
9	21
10	23
11	29
12	31
13	35
14	37
15	39
16	41
17	43
18	47
19	53
20	55
21	57
22	59
23	61
24	65
25	67
26	71
27	73
28	77
29	79
30	83
31	85
32	89
33	93
34	97
35	101
36	103
37	107
38	109
39	111
40	113
41	115
42	119
43	127
44	129
45	131
46	133
47	137
48	139
49	143
50	149
51	151
52	155

n	a(n)
1	1
2	3
3	5
4	7
5	11
6	13
7	17
8	19
9	21
10	23
11	29
12	31
13	35
14	37
15	39
16	41
17	43
18	47
19	53
20	55
21	57
22	59
23	61
24	65
25	67
26	71
27	73
28	77
29	79
30	83
31	85
32	89
33	93
34	97
35	101
36	103
37	107
38	109
39	111
40	113
41	115
42	119
43	127
44	129
45	131
46	133
47	137
48	139
49	143
50	149
51	151
52	155

n	a(n)
1	1
2	3
3	5
4	7
5	11
6	13
7	17
8	19
9	21
10	23
11	29
12	31
13	35
14	37
15	39
16	41
17	43
18	47
19	53
20	55
21	57
22	59
23	61
24	65
25	67
26	71
27	73
28	77
29	79
30	83
31	85
32	89
33	93
34	97
35	101
36	103
37	107
38	109
39	111
40	113
41	115
42	119
43	127
44	129
45	131
46	133
47	137
48	139
49	143
50	149
51	151
52	155