A317024 - cp's OEIS frontend

A317024 Lexicographically earliest sequence of positive terms such that for any distinct i and j, lcm(a(i), a(i+1)) and lcm(a(j), a(j+1)) are distinct.

n	a(n)
1	1
2	1
3	2
4	3
5	1
6	4
7	3
8	5
9	1
10	7
11	2
12	5
13	4
14	7
15	3
16	8
17	1
18	9
19	2
20	11
21	1
22	13
23	2
24	15
25	4
26	9
27	5
28	7
29	6
30	11
31	3
32	13
33	4
34	11
35	5
36	8
37	7
38	9
39	8
40	11
41	7
42	10
43	9
44	11
45	10
46	13
47	5
48	16
49	1
50	17
51	2
52	19
53	1
54	23
55	2
56	25
57	1
58	27
59	2
60	29
61	1
62	31
63	2
64	32
65	3
66	16
67	7
68	12
69	11
70	13
71	6
72	17
73	3
74	19
75	4
76	17
77	5
78	19

[1, 1, 2, 3, 1, 4, 3, 5, 1, 7, 2, 5, 4, 7, 3, 8, 1, 9, 2, 11, 1, 13, 2, 15, 4, 9, 5, 7, 6, 11, 3, 13, 4, 11, 5, 8, 7, 9, 8, 11, 7, 10, 9, 11, 10, 13, 5, 16, 1, 17, 2, 19, 1, 23, 2, 25, 1, 27, 2, 29, 1, 31, 2, 32, 3, 16, 7, 12, 11, 13, 6, 17, 3, 19, 4, 17, 5, 19]

cp's OEIS Frontend

A317024 Lexicographically earliest sequence of positive terms such that for any distinct i and j, lcm(a(i), a(i+1)) and lcm(a(j), a(j+1)) are distinct.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	3
5	1
6	4
7	3
8	5
9	1
10	7
11	2
12	5
13	4
14	7
15	3
16	8
17	1
18	9
19	2
20	11
21	1
22	13
23	2
24	15
25	4
26	9
27	5
28	7
29	6
30	11
31	3
32	13
33	4
34	11
35	5
36	8
37	7
38	9
39	8
40	11
41	7
42	10
43	9
44	11
45	10
46	13
47	5
48	16
49	1
50	17
51	2
52	19
53	1
54	23
55	2
56	25
57	1
58	27
59	2
60	29
61	1
62	31
63	2
64	32
65	3
66	16
67	7
68	12
69	11
70	13
71	6
72	17
73	3
74	19
75	4
76	17
77	5
78	19

n	a(n)
1	1
2	1
3	2
4	3
5	1
6	4
7	3
8	5
9	1
10	7
11	2
12	5
13	4
14	7
15	3
16	8
17	1
18	9
19	2
20	11
21	1
22	13
23	2
24	15
25	4
26	9
27	5
28	7
29	6
30	11
31	3
32	13
33	4
34	11
35	5
36	8
37	7
38	9
39	8
40	11
41	7
42	10
43	9
44	11
45	10
46	13
47	5
48	16
49	1
50	17
51	2
52	19
53	1
54	23
55	2
56	25
57	1
58	27
59	2
60	29
61	1
62	31
63	2
64	32
65	3
66	16
67	7
68	12
69	11
70	13
71	6
72	17
73	3
74	19
75	4
76	17
77	5
78	19

n	a(n)
1	1
2	1
3	2
4	3
5	1
6	4
7	3
8	5
9	1
10	7
11	2
12	5
13	4
14	7
15	3
16	8
17	1
18	9
19	2
20	11
21	1
22	13
23	2
24	15
25	4
26	9
27	5
28	7
29	6
30	11
31	3
32	13
33	4
34	11
35	5
36	8
37	7
38	9
39	8
40	11
41	7
42	10
43	9
44	11
45	10
46	13
47	5
48	16
49	1
50	17
51	2
52	19
53	1
54	23
55	2
56	25
57	1
58	27
59	2
60	29
61	1
62	31
63	2
64	32
65	3
66	16
67	7
68	12
69	11
70	13
71	6
72	17
73	3
74	19
75	4
76	17
77	5
78	19