A371183 - cp's OEIS frontend

A371183 Lexicographically earliest sequence of distinct terms in which every triple of consecutive digits contains only one pair that is not coprime.

n	a(n)
1	1
2	2
3	4
4	3
5	8
6	9
7	22
8	5
9	6
10	21
11	20
12	10
13	7
14	17
15	71
16	70
17	12
18	23
19	24
20	14
21	25
22	26
23	13
24	31
25	30
26	15
27	51
28	50
29	16
30	27
31	28
32	18
33	29
34	32
35	33
36	19
37	34
38	38
39	39
40	42
41	52
42	41
43	40
44	100
45	102
46	103
47	104
48	105
49	106
50	107
51	108
52	109
53	130
54	120
55	122
56	54
57	43
58	35
59	36
60	53
61	37
62	62
63	55
64	44
65	56
66	45
67	46
68	58
69	47
70	48

[1, 2, 4, 3, 8, 9, 22, 5, 6, 21, 20, 10, 7, 17, 71, 70, 12, 23, 24, 14, 25, 26, 13, 31, 30, 15, 51, 50, 16, 27, 28, 18, 29, 32, 33, 19, 34, 38, 39, 42, 52, 41, 40, 100, 102, 103, 104, 105, 106, 107, 108, 109, 130, 120, 122, 54, 43, 35, 36, 53, 37, 62, 55, 44, 56, 45, 46, 58, 47, 48]

cp's OEIS Frontend

A371183 Lexicographically earliest sequence of distinct terms in which every triple of consecutive digits contains only one pair that is not coprime.

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	3
5	8
6	9
7	22
8	5
9	6
10	21
11	20
12	10
13	7
14	17
15	71
16	70
17	12
18	23
19	24
20	14
21	25
22	26
23	13
24	31
25	30
26	15
27	51
28	50
29	16
30	27
31	28
32	18
33	29
34	32
35	33
36	19
37	34
38	38
39	39
40	42
41	52
42	41
43	40
44	100
45	102
46	103
47	104
48	105
49	106
50	107
51	108
52	109
53	130
54	120
55	122
56	54
57	43
58	35
59	36
60	53
61	37
62	62
63	55
64	44
65	56
66	45
67	46
68	58
69	47
70	48

n	a(n)
1	1
2	2
3	4
4	3
5	8
6	9
7	22
8	5
9	6
10	21
11	20
12	10
13	7
14	17
15	71
16	70
17	12
18	23
19	24
20	14
21	25
22	26
23	13
24	31
25	30
26	15
27	51
28	50
29	16
30	27
31	28
32	18
33	29
34	32
35	33
36	19
37	34
38	38
39	39
40	42
41	52
42	41
43	40
44	100
45	102
46	103
47	104
48	105
49	106
50	107
51	108
52	109
53	130
54	120
55	122
56	54
57	43
58	35
59	36
60	53
61	37
62	62
63	55
64	44
65	56
66	45
67	46
68	58
69	47
70	48

n	a(n)
1	1
2	2
3	4
4	3
5	8
6	9
7	22
8	5
9	6
10	21
11	20
12	10
13	7
14	17
15	71
16	70
17	12
18	23
19	24
20	14
21	25
22	26
23	13
24	31
25	30
26	15
27	51
28	50
29	16
30	27
31	28
32	18
33	29
34	32
35	33
36	19
37	34
38	38
39	39
40	42
41	52
42	41
43	40
44	100
45	102
46	103
47	104
48	105
49	106
50	107
51	108
52	109
53	130
54	120
55	122
56	54
57	43
58	35
59	36
60	53
61	37
62	62
63	55
64	44
65	56
66	45
67	46
68	58
69	47
70	48