A353187 - cp's OEIS frontend

A353187 Lexicographically earliest strictly increasing sequence of positive integers in which every triple of consecutive terms contains only one pair that is not coprime.

n	a(n)
1	1
2	2
3	4
4	5
5	6
6	8
7	11
8	12
9	14
10	17
11	18
12	20
13	23
14	24
15	26
16	29
17	30
18	32
19	37
20	38
21	40
22	41
23	42
24	44
25	47
26	48
27	50
28	53
29	54
30	56
31	59
32	60
33	62
34	67
35	68
36	70
37	71
38	72
39	74
40	77
41	78
42	80
43	83
44	84
45	86
46	89
47	90
48	92
49	97
50	98
51	100
52	101
53	102
54	104
55	107
56	108
57	110
58	113
59	114
60	116
61	119
62	120
63	122
64	127
65	128
66	130
67	131

[1, 2, 4, 5, 6, 8, 11, 12, 14, 17, 18, 20, 23, 24, 26, 29, 30, 32, 37, 38, 40, 41, 42, 44, 47, 48, 50, 53, 54, 56, 59, 60, 62, 67, 68, 70, 71, 72, 74, 77, 78, 80, 83, 84, 86, 89, 90, 92, 97, 98, 100, 101, 102, 104, 107, 108, 110, 113, 114, 116, 119, 120, 122, 127, 128, 130, 131]

cp's OEIS Frontend

A353187 Lexicographically earliest strictly increasing sequence of positive integers in which every triple of consecutive terms contains only one pair that is not coprime.

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	5
5	6
6	8
7	11
8	12
9	14
10	17
11	18
12	20
13	23
14	24
15	26
16	29
17	30
18	32
19	37
20	38
21	40
22	41
23	42
24	44
25	47
26	48
27	50
28	53
29	54
30	56
31	59
32	60
33	62
34	67
35	68
36	70
37	71
38	72
39	74
40	77
41	78
42	80
43	83
44	84
45	86
46	89
47	90
48	92
49	97
50	98
51	100
52	101
53	102
54	104
55	107
56	108
57	110
58	113
59	114
60	116
61	119
62	120
63	122
64	127
65	128
66	130
67	131

n	a(n)
1	1
2	2
3	4
4	5
5	6
6	8
7	11
8	12
9	14
10	17
11	18
12	20
13	23
14	24
15	26
16	29
17	30
18	32
19	37
20	38
21	40
22	41
23	42
24	44
25	47
26	48
27	50
28	53
29	54
30	56
31	59
32	60
33	62
34	67
35	68
36	70
37	71
38	72
39	74
40	77
41	78
42	80
43	83
44	84
45	86
46	89
47	90
48	92
49	97
50	98
51	100
52	101
53	102
54	104
55	107
56	108
57	110
58	113
59	114
60	116
61	119
62	120
63	122
64	127
65	128
66	130
67	131

n	a(n)
1	1
2	2
3	4
4	5
5	6
6	8
7	11
8	12
9	14
10	17
11	18
12	20
13	23
14	24
15	26
16	29
17	30
18	32
19	37
20	38
21	40
22	41
23	42
24	44
25	47
26	48
27	50
28	53
29	54
30	56
31	59
32	60
33	62
34	67
35	68
36	70
37	71
38	72
39	74
40	77
41	78
42	80
43	83
44	84
45	86
46	89
47	90
48	92
49	97
50	98
51	100
52	101
53	102
54	104
55	107
56	108
57	110
58	113
59	114
60	116
61	119
62	120
63	122
64	127
65	128
66	130
67	131