A371182 - cp's OEIS frontend

A371182 Lexicographically earliest strictly increasing sequence of positive integers 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	5
5	6
6	8
7	10
8	21
9	22
10	32
11	33
12	42
13	52
14	54
15	55
16	62
17	72
18	74
19	76
20	77
21	82
22	92
23	93
24	100
25	102
26	103
27	104
28	105
29	106
30	107
31	108
32	109
33	130
34	133
35	136
36	139
37	160
38	162
39	163
40	164
41	166
42	168
43	169
44	190
45	193
46	196
47	199
48	221
49	223
50	225
51	227
52	229
53	232
54	233
55	234
56	238
57	239
58	241
59	243
60	245

[1, 2, 4, 5, 6, 8, 10, 21, 22, 32, 33, 42, 52, 54, 55, 62, 72, 74, 76, 77, 82, 92, 93, 100, 102, 103, 104, 105, 106, 107, 108, 109, 130, 133, 136, 139, 160, 162, 163, 164, 166, 168, 169, 190, 193, 196, 199, 221, 223, 225, 227, 229, 232, 233, 234, 238, 239, 241, 243, 245]

cp's OEIS Frontend

A371182 Lexicographically earliest strictly increasing sequence of positive integers 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	5
5	6
6	8
7	10
8	21
9	22
10	32
11	33
12	42
13	52
14	54
15	55
16	62
17	72
18	74
19	76
20	77
21	82
22	92
23	93
24	100
25	102
26	103
27	104
28	105
29	106
30	107
31	108
32	109
33	130
34	133
35	136
36	139
37	160
38	162
39	163
40	164
41	166
42	168
43	169
44	190
45	193
46	196
47	199
48	221
49	223
50	225
51	227
52	229
53	232
54	233
55	234
56	238
57	239
58	241
59	243
60	245

n	a(n)
1	1
2	2
3	4
4	5
5	6
6	8
7	10
8	21
9	22
10	32
11	33
12	42
13	52
14	54
15	55
16	62
17	72
18	74
19	76
20	77
21	82
22	92
23	93
24	100
25	102
26	103
27	104
28	105
29	106
30	107
31	108
32	109
33	130
34	133
35	136
36	139
37	160
38	162
39	163
40	164
41	166
42	168
43	169
44	190
45	193
46	196
47	199
48	221
49	223
50	225
51	227
52	229
53	232
54	233
55	234
56	238
57	239
58	241
59	243
60	245

n	a(n)
1	1
2	2
3	4
4	5
5	6
6	8
7	10
8	21
9	22
10	32
11	33
12	42
13	52
14	54
15	55
16	62
17	72
18	74
19	76
20	77
21	82
22	92
23	93
24	100
25	102
26	103
27	104
28	105
29	106
30	107
31	108
32	109
33	130
34	133
35	136
36	139
37	160
38	162
39	163
40	164
41	166
42	168
43	169
44	190
45	193
46	196
47	199
48	221
49	223
50	225
51	227
52	229
53	232
54	233
55	234
56	238
57	239
58	241
59	243
60	245