A262159 - cp's OEIS frontend

A262159 a(1) = 1, for n > 1 the least composite number k > a(n-1) such that a(n-1) + k is also a composite number.

n	a(n)
1	1
2	8
3	10
4	12
5	14
6	16
7	18
8	20
9	22
10	24
11	25
12	26
13	28
14	30
15	32
16	33
17	35
18	39
19	42
20	44
21	46
22	48
23	50
24	52
25	54
26	56
27	58
28	60
29	62
30	63
31	65
32	68
33	70
34	72
35	74
36	76
37	77
38	78
39	80
40	81
41	84
42	85
43	86
44	88
45	90
46	92
47	93
48	94
49	95
50	99
51	102
52	104
53	105
54	108
55	110
56	111
57	114
58	116
59	118
60	119
61	121
62	122
63	123
64	124
65	125
66	128
67	130
68	132
69	133
70	134

[1, 8, 10, 12, 14, 16, 18, 20, 22, 24, 25, 26, 28, 30, 32, 33, 35, 39, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 63, 65, 68, 70, 72, 74, 76, 77, 78, 80, 81, 84, 85, 86, 88, 90, 92, 93, 94, 95, 99, 102, 104, 105, 108, 110, 111, 114, 116, 118, 119, 121, 122, 123, 124, 125, 128, 130, 132, 133, 134]

cp's OEIS Frontend

A262159 a(1) = 1, for n > 1 the least composite number k > a(n-1) such that a(n-1) + k is also a composite number.

Table of values

List of values

n	a(n)
1	1
2	8
3	10
4	12
5	14
6	16
7	18
8	20
9	22
10	24
11	25
12	26
13	28
14	30
15	32
16	33
17	35
18	39
19	42
20	44
21	46
22	48
23	50
24	52
25	54
26	56
27	58
28	60
29	62
30	63
31	65
32	68
33	70
34	72
35	74
36	76
37	77
38	78
39	80
40	81
41	84
42	85
43	86
44	88
45	90
46	92
47	93
48	94
49	95
50	99
51	102
52	104
53	105
54	108
55	110
56	111
57	114
58	116
59	118
60	119
61	121
62	122
63	123
64	124
65	125
66	128
67	130
68	132
69	133
70	134

n	a(n)
1	1
2	8
3	10
4	12
5	14
6	16
7	18
8	20
9	22
10	24
11	25
12	26
13	28
14	30
15	32
16	33
17	35
18	39
19	42
20	44
21	46
22	48
23	50
24	52
25	54
26	56
27	58
28	60
29	62
30	63
31	65
32	68
33	70
34	72
35	74
36	76
37	77
38	78
39	80
40	81
41	84
42	85
43	86
44	88
45	90
46	92
47	93
48	94
49	95
50	99
51	102
52	104
53	105
54	108
55	110
56	111
57	114
58	116
59	118
60	119
61	121
62	122
63	123
64	124
65	125
66	128
67	130
68	132
69	133
70	134

n	a(n)
1	1
2	8
3	10
4	12
5	14
6	16
7	18
8	20
9	22
10	24
11	25
12	26
13	28
14	30
15	32
16	33
17	35
18	39
19	42
20	44
21	46
22	48
23	50
24	52
25	54
26	56
27	58
28	60
29	62
30	63
31	65
32	68
33	70
34	72
35	74
36	76
37	77
38	78
39	80
40	81
41	84
42	85
43	86
44	88
45	90
46	92
47	93
48	94
49	95
50	99
51	102
52	104
53	105
54	108
55	110
56	111
57	114
58	116
59	118
60	119
61	121
62	122
63	123
64	124
65	125
66	128
67	130
68	132
69	133
70	134