A376566 - cp's OEIS frontend

A376566 Lexicographically earliest sequence of positive integers such that for any n > 0, there is an even number of k's such that 1 <= k < n and a(n) divides a(k).

n	a(n)
1	1
2	2
3	1
4	3
5	1
6	4
7	1
8	2
9	1
10	5
11	1
12	6
13	1
14	2
15	1
16	3
17	1
18	7
19	1
20	8
21	1
22	2
23	1
24	4
25	1
26	2
27	1
28	9
29	1
30	3
31	1
32	10
33	1
34	2
35	1
36	5
37	1
38	11
39	1
40	12
41	1
42	2
43	1
44	3
45	1
46	4
47	1
48	2
49	1
50	6
51	1
52	2
53	1
54	3
55	1
56	13
57	1
58	14
59	1
60	2
61	1
62	7
63	1
64	15
65	1
66	3
67	1
68	5
69	1
70	16
71	1
72	2
73	1
74	4
75	1
76	2
77	1
78	8
79	1
80	2
81	1
82	4
83	1
84	2
85	1

[1, 2, 1, 3, 1, 4, 1, 2, 1, 5, 1, 6, 1, 2, 1, 3, 1, 7, 1, 8, 1, 2, 1, 4, 1, 2, 1, 9, 1, 3, 1, 10, 1, 2, 1, 5, 1, 11, 1, 12, 1, 2, 1, 3, 1, 4, 1, 2, 1, 6, 1, 2, 1, 3, 1, 13, 1, 14, 1, 2, 1, 7, 1, 15, 1, 3, 1, 5, 1, 16, 1, 2, 1, 4, 1, 2, 1, 8, 1, 2, 1, 4, 1, 2, 1]

cp's OEIS Frontend

A376566 Lexicographically earliest sequence of positive integers such that for any n > 0, there is an even number of k's such that 1 <= k < n and a(n) divides a(k).

Table of values

List of values

n	a(n)
1	1
2	2
3	1
4	3
5	1
6	4
7	1
8	2
9	1
10	5
11	1
12	6
13	1
14	2
15	1
16	3
17	1
18	7
19	1
20	8
21	1
22	2
23	1
24	4
25	1
26	2
27	1
28	9
29	1
30	3
31	1
32	10
33	1
34	2
35	1
36	5
37	1
38	11
39	1
40	12
41	1
42	2
43	1
44	3
45	1
46	4
47	1
48	2
49	1
50	6
51	1
52	2
53	1
54	3
55	1
56	13
57	1
58	14
59	1
60	2
61	1
62	7
63	1
64	15
65	1
66	3
67	1
68	5
69	1
70	16
71	1
72	2
73	1
74	4
75	1
76	2
77	1
78	8
79	1
80	2
81	1
82	4
83	1
84	2
85	1

n	a(n)
1	1
2	2
3	1
4	3
5	1
6	4
7	1
8	2
9	1
10	5
11	1
12	6
13	1
14	2
15	1
16	3
17	1
18	7
19	1
20	8
21	1
22	2
23	1
24	4
25	1
26	2
27	1
28	9
29	1
30	3
31	1
32	10
33	1
34	2
35	1
36	5
37	1
38	11
39	1
40	12
41	1
42	2
43	1
44	3
45	1
46	4
47	1
48	2
49	1
50	6
51	1
52	2
53	1
54	3
55	1
56	13
57	1
58	14
59	1
60	2
61	1
62	7
63	1
64	15
65	1
66	3
67	1
68	5
69	1
70	16
71	1
72	2
73	1
74	4
75	1
76	2
77	1
78	8
79	1
80	2
81	1
82	4
83	1
84	2
85	1

n	a(n)
1	1
2	2
3	1
4	3
5	1
6	4
7	1
8	2
9	1
10	5
11	1
12	6
13	1
14	2
15	1
16	3
17	1
18	7
19	1
20	8
21	1
22	2
23	1
24	4
25	1
26	2
27	1
28	9
29	1
30	3
31	1
32	10
33	1
34	2
35	1
36	5
37	1
38	11
39	1
40	12
41	1
42	2
43	1
44	3
45	1
46	4
47	1
48	2
49	1
50	6
51	1
52	2
53	1
54	3
55	1
56	13
57	1
58	14
59	1
60	2
61	1
62	7
63	1
64	15
65	1
66	3
67	1
68	5
69	1
70	16
71	1
72	2
73	1
74	4
75	1
76	2
77	1
78	8
79	1
80	2
81	1
82	4
83	1
84	2
85	1