A336379 - cp's OEIS frontend

A336379 Numbers k such that gcd(k, prime(k-1) + prime(k+1)) > 1.

n	a(n)
1	4
2	5
3	6
4	8
5	9
6	10
7	11
8	12
9	14
10	15
11	16
12	18
13	20
14	21
15	22
16	24
17	25
18	26
19	28
20	30
21	32
22	33
23	34
24	35
25	36
26	38
27	39
28	40
29	42
30	44
31	46
32	48
33	50
34	51
35	52
36	54
37	56
38	57
39	58
40	60
41	62
42	64
43	66
44	68
45	70
46	72
47	74
48	75
49	76
50	78
51	80
52	82
53	84
54	86
55	87
56	88
57	90
58	92
59	94
60	96
61	98
62	99
63	100
64	102
65	104

[4, 5, 6, 8, 9, 10, 11, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 46, 48, 50, 51, 52, 54, 56, 57, 58, 60, 62, 64, 66, 68, 70, 72, 74, 75, 76, 78, 80, 82, 84, 86, 87, 88, 90, 92, 94, 96, 98, 99, 100, 102, 104]

cp's OEIS Frontend

A336379 Numbers k such that gcd(k, prime(k-1) + prime(k+1)) > 1.

Table of values

List of values

n	a(n)
1	4
2	5
3	6
4	8
5	9
6	10
7	11
8	12
9	14
10	15
11	16
12	18
13	20
14	21
15	22
16	24
17	25
18	26
19	28
20	30
21	32
22	33
23	34
24	35
25	36
26	38
27	39
28	40
29	42
30	44
31	46
32	48
33	50
34	51
35	52
36	54
37	56
38	57
39	58
40	60
41	62
42	64
43	66
44	68
45	70
46	72
47	74
48	75
49	76
50	78
51	80
52	82
53	84
54	86
55	87
56	88
57	90
58	92
59	94
60	96
61	98
62	99
63	100
64	102
65	104

n	a(n)
1	4
2	5
3	6
4	8
5	9
6	10
7	11
8	12
9	14
10	15
11	16
12	18
13	20
14	21
15	22
16	24
17	25
18	26
19	28
20	30
21	32
22	33
23	34
24	35
25	36
26	38
27	39
28	40
29	42
30	44
31	46
32	48
33	50
34	51
35	52
36	54
37	56
38	57
39	58
40	60
41	62
42	64
43	66
44	68
45	70
46	72
47	74
48	75
49	76
50	78
51	80
52	82
53	84
54	86
55	87
56	88
57	90
58	92
59	94
60	96
61	98
62	99
63	100
64	102
65	104

n	a(n)
1	4
2	5
3	6
4	8
5	9
6	10
7	11
8	12
9	14
10	15
11	16
12	18
13	20
14	21
15	22
16	24
17	25
18	26
19	28
20	30
21	32
22	33
23	34
24	35
25	36
26	38
27	39
28	40
29	42
30	44
31	46
32	48
33	50
34	51
35	52
36	54
37	56
38	57
39	58
40	60
41	62
42	64
43	66
44	68
45	70
46	72
47	74
48	75
49	76
50	78
51	80
52	82
53	84
54	86
55	87
56	88
57	90
58	92
59	94
60	96
61	98
62	99
63	100
64	102
65	104