A068780 - cp's OEIS frontend

A068780 Composite numbers n such that n+1 is also composite.

n	a(n)
1	8
2	9
3	14
4	15
5	20
6	21
7	24
8	25
9	26
10	27
11	32
12	33
13	34
14	35
15	38
16	39
17	44
18	45
19	48
20	49
21	50
22	51
23	54
24	55
25	56
26	57
27	62
28	63
29	64
30	65
31	68
32	69
33	74
34	75
35	76
36	77
37	80
38	81
39	84
40	85
41	86
42	87
43	90
44	91
45	92
46	93
47	94
48	95
49	98
50	99
51	104
52	105
53	110
54	111
55	114
56	115
57	116
58	117
59	118
60	119
61	120
62	121
63	122
64	123
65	124

[8, 9, 14, 15, 20, 21, 24, 25, 26, 27, 32, 33, 34, 35, 38, 39, 44, 45, 48, 49, 50, 51, 54, 55, 56, 57, 62, 63, 64, 65, 68, 69, 74, 75, 76, 77, 80, 81, 84, 85, 86, 87, 90, 91, 92, 93, 94, 95, 98, 99, 104, 105, 110, 111, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124]

cp's OEIS Frontend

A068780 Composite numbers n such that n+1 is also composite.

Table of values

List of values

n	a(n)
1	8
2	9
3	14
4	15
5	20
6	21
7	24
8	25
9	26
10	27
11	32
12	33
13	34
14	35
15	38
16	39
17	44
18	45
19	48
20	49
21	50
22	51
23	54
24	55
25	56
26	57
27	62
28	63
29	64
30	65
31	68
32	69
33	74
34	75
35	76
36	77
37	80
38	81
39	84
40	85
41	86
42	87
43	90
44	91
45	92
46	93
47	94
48	95
49	98
50	99
51	104
52	105
53	110
54	111
55	114
56	115
57	116
58	117
59	118
60	119
61	120
62	121
63	122
64	123
65	124

n	a(n)
1	8
2	9
3	14
4	15
5	20
6	21
7	24
8	25
9	26
10	27
11	32
12	33
13	34
14	35
15	38
16	39
17	44
18	45
19	48
20	49
21	50
22	51
23	54
24	55
25	56
26	57
27	62
28	63
29	64
30	65
31	68
32	69
33	74
34	75
35	76
36	77
37	80
38	81
39	84
40	85
41	86
42	87
43	90
44	91
45	92
46	93
47	94
48	95
49	98
50	99
51	104
52	105
53	110
54	111
55	114
56	115
57	116
58	117
59	118
60	119
61	120
62	121
63	122
64	123
65	124

n	a(n)
1	8
2	9
3	14
4	15
5	20
6	21
7	24
8	25
9	26
10	27
11	32
12	33
13	34
14	35
15	38
16	39
17	44
18	45
19	48
20	49
21	50
22	51
23	54
24	55
25	56
26	57
27	62
28	63
29	64
30	65
31	68
32	69
33	74
34	75
35	76
36	77
37	80
38	81
39	84
40	85
41	86
42	87
43	90
44	91
45	92
46	93
47	94
48	95
49	98
50	99
51	104
52	105
53	110
54	111
55	114
56	115
57	116
58	117
59	118
60	119
61	120
62	121
63	122
64	123
65	124