A062505 - cp's OEIS frontend

A062505 Numbers k such that if p is a prime that divides k, then either p + 2 or p - 2 is also prime.

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	11
7	13
8	15
9	17
10	19
11	21
12	25
13	27
14	29
15	31
16	33
17	35
18	39
19	41
20	43
21	45
22	49
23	51
24	55
25	57
26	59
27	61
28	63
29	65
30	71
31	73
32	75
33	77
34	81
35	85
36	87
37	91
38	93
39	95
40	99
41	101
42	103
43	105
44	107
45	109
46	117
47	119
48	121
49	123
50	125
51	129
52	133
53	135
54	137
55	139
56	143
57	145
58	147
59	149
60	151
61	153
62	155
63	165

[1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 25, 27, 29, 31, 33, 35, 39, 41, 43, 45, 49, 51, 55, 57, 59, 61, 63, 65, 71, 73, 75, 77, 81, 85, 87, 91, 93, 95, 99, 101, 103, 105, 107, 109, 117, 119, 121, 123, 125, 129, 133, 135, 137, 139, 143, 145, 147, 149, 151, 153, 155, 165]

cp's OEIS Frontend

A062505 Numbers k such that if p is a prime that divides k, then either p + 2 or p - 2 is also prime.

Table of values

List of values

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	11
7	13
8	15
9	17
10	19
11	21
12	25
13	27
14	29
15	31
16	33
17	35
18	39
19	41
20	43
21	45
22	49
23	51
24	55
25	57
26	59
27	61
28	63
29	65
30	71
31	73
32	75
33	77
34	81
35	85
36	87
37	91
38	93
39	95
40	99
41	101
42	103
43	105
44	107
45	109
46	117
47	119
48	121
49	123
50	125
51	129
52	133
53	135
54	137
55	139
56	143
57	145
58	147
59	149
60	151
61	153
62	155
63	165

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	11
7	13
8	15
9	17
10	19
11	21
12	25
13	27
14	29
15	31
16	33
17	35
18	39
19	41
20	43
21	45
22	49
23	51
24	55
25	57
26	59
27	61
28	63
29	65
30	71
31	73
32	75
33	77
34	81
35	85
36	87
37	91
38	93
39	95
40	99
41	101
42	103
43	105
44	107
45	109
46	117
47	119
48	121
49	123
50	125
51	129
52	133
53	135
54	137
55	139
56	143
57	145
58	147
59	149
60	151
61	153
62	155
63	165

n	a(n)
1	1
2	3
3	5
4	7
5	9
6	11
7	13
8	15
9	17
10	19
11	21
12	25
13	27
14	29
15	31
16	33
17	35
18	39
19	41
20	43
21	45
22	49
23	51
24	55
25	57
26	59
27	61
28	63
29	65
30	71
31	73
32	75
33	77
34	81
35	85
36	87
37	91
38	93
39	95
40	99
41	101
42	103
43	105
44	107
45	109
46	117
47	119
48	121
49	123
50	125
51	129
52	133
53	135
54	137
55	139
56	143
57	145
58	147
59	149
60	151
61	153
62	155
63	165