A356007 - cp's OEIS frontend

A356007 Lexicographically earliest strictly increasing sequence of positive integers in which every triple of consecutive terms contains only one pair whose numbers of divisors are not coprime.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	9
8	10
9	11
10	16
11	17
12	18
13	64
14	65
15	66
16	81
17	82
18	83
19	100
20	101
21	102
22	121
23	122
24	123
25	144
26	145
27	146
28	169
29	170
30	173
31	196
32	197
33	199
34	225
35	226
36	227
37	256
38	257
39	258
40	289
41	290
42	291
43	324
44	326
45	327
46	361
47	362
48	365
49	400
50	401
51	402
52	441
53	442
54	443
55	484
56	485
57	487
58	529
59	530
60	533
61	576
62	577
63	579

[1, 2, 3, 4, 5, 6, 9, 10, 11, 16, 17, 18, 64, 65, 66, 81, 82, 83, 100, 101, 102, 121, 122, 123, 144, 145, 146, 169, 170, 173, 196, 197, 199, 225, 226, 227, 256, 257, 258, 289, 290, 291, 324, 326, 327, 361, 362, 365, 400, 401, 402, 441, 442, 443, 484, 485, 487, 529, 530, 533, 576, 577, 579]

cp's OEIS Frontend

A356007 Lexicographically earliest strictly increasing sequence of positive integers in which every triple of consecutive terms contains only one pair whose numbers of divisors are not coprime.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	9
8	10
9	11
10	16
11	17
12	18
13	64
14	65
15	66
16	81
17	82
18	83
19	100
20	101
21	102
22	121
23	122
24	123
25	144
26	145
27	146
28	169
29	170
30	173
31	196
32	197
33	199
34	225
35	226
36	227
37	256
38	257
39	258
40	289
41	290
42	291
43	324
44	326
45	327
46	361
47	362
48	365
49	400
50	401
51	402
52	441
53	442
54	443
55	484
56	485
57	487
58	529
59	530
60	533
61	576
62	577
63	579

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	9
8	10
9	11
10	16
11	17
12	18
13	64
14	65
15	66
16	81
17	82
18	83
19	100
20	101
21	102
22	121
23	122
24	123
25	144
26	145
27	146
28	169
29	170
30	173
31	196
32	197
33	199
34	225
35	226
36	227
37	256
38	257
39	258
40	289
41	290
42	291
43	324
44	326
45	327
46	361
47	362
48	365
49	400
50	401
51	402
52	441
53	442
54	443
55	484
56	485
57	487
58	529
59	530
60	533
61	576
62	577
63	579

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	9
8	10
9	11
10	16
11	17
12	18
13	64
14	65
15	66
16	81
17	82
18	83
19	100
20	101
21	102
22	121
23	122
24	123
25	144
26	145
27	146
28	169
29	170
30	173
31	196
32	197
33	199
34	225
35	226
36	227
37	256
38	257
39	258
40	289
41	290
42	291
43	324
44	326
45	327
46	361
47	362
48	365
49	400
50	401
51	402
52	441
53	442
54	443
55	484
56	485
57	487
58	529
59	530
60	533
61	576
62	577
63	579