A330623 - cp's OEIS frontend

A330623 Lexicographically earliest sequence of positive terms such that for any n > 0 and k > 0, a(n+2*k) <> gcd(a(n), a(n+k)).

n	a(n)
1	1
2	1
3	2
4	2
5	3
6	2
7	2
8	3
9	3
10	4
11	4
12	2
13	4
14	3
15	3
16	5
17	3
18	3
19	4
20	4
21	5
22	4
23	4
24	2
25	5
26	6
27	2
28	5
29	6
30	3
31	6
32	4
33	3
34	6
35	6
36	5
37	4
38	4
39	3
40	4
41	5
42	5
43	6
44	7
45	5
46	4
47	4
48	6
49	4
50	4
51	7
52	5
53	5
54	6
55	5
56	6
57	7
58	8
59	4
60	5
61	7
62	7
63	6
64	7
65	8
66	6
67	3
68	6
69	7
70	8
71	5
72	5
73	8
74	3
75	6
76	9
77	5
78	8
79	7
80	5
81	9
82	7
83	7
84	8
85	6
86	5
87	8

[1, 1, 2, 2, 3, 2, 2, 3, 3, 4, 4, 2, 4, 3, 3, 5, 3, 3, 4, 4, 5, 4, 4, 2, 5, 6, 2, 5, 6, 3, 6, 4, 3, 6, 6, 5, 4, 4, 3, 4, 5, 5, 6, 7, 5, 4, 4, 6, 4, 4, 7, 5, 5, 6, 5, 6, 7, 8, 4, 5, 7, 7, 6, 7, 8, 6, 3, 6, 7, 8, 5, 5, 8, 3, 6, 9, 5, 8, 7, 5, 9, 7, 7, 8, 6, 5, 8]

cp's OEIS Frontend

A330623 Lexicographically earliest sequence of positive terms such that for any n > 0 and k > 0, a(n+2*k) <> gcd(a(n), a(n+k)).

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	2
5	3
6	2
7	2
8	3
9	3
10	4
11	4
12	2
13	4
14	3
15	3
16	5
17	3
18	3
19	4
20	4
21	5
22	4
23	4
24	2
25	5
26	6
27	2
28	5
29	6
30	3
31	6
32	4
33	3
34	6
35	6
36	5
37	4
38	4
39	3
40	4
41	5
42	5
43	6
44	7
45	5
46	4
47	4
48	6
49	4
50	4
51	7
52	5
53	5
54	6
55	5
56	6
57	7
58	8
59	4
60	5
61	7
62	7
63	6
64	7
65	8
66	6
67	3
68	6
69	7
70	8
71	5
72	5
73	8
74	3
75	6
76	9
77	5
78	8
79	7
80	5
81	9
82	7
83	7
84	8
85	6
86	5
87	8

n	a(n)
1	1
2	1
3	2
4	2
5	3
6	2
7	2
8	3
9	3
10	4
11	4
12	2
13	4
14	3
15	3
16	5
17	3
18	3
19	4
20	4
21	5
22	4
23	4
24	2
25	5
26	6
27	2
28	5
29	6
30	3
31	6
32	4
33	3
34	6
35	6
36	5
37	4
38	4
39	3
40	4
41	5
42	5
43	6
44	7
45	5
46	4
47	4
48	6
49	4
50	4
51	7
52	5
53	5
54	6
55	5
56	6
57	7
58	8
59	4
60	5
61	7
62	7
63	6
64	7
65	8
66	6
67	3
68	6
69	7
70	8
71	5
72	5
73	8
74	3
75	6
76	9
77	5
78	8
79	7
80	5
81	9
82	7
83	7
84	8
85	6
86	5
87	8

n	a(n)
1	1
2	1
3	2
4	2
5	3
6	2
7	2
8	3
9	3
10	4
11	4
12	2
13	4
14	3
15	3
16	5
17	3
18	3
19	4
20	4
21	5
22	4
23	4
24	2
25	5
26	6
27	2
28	5
29	6
30	3
31	6
32	4
33	3
34	6
35	6
36	5
37	4
38	4
39	3
40	4
41	5
42	5
43	6
44	7
45	5
46	4
47	4
48	6
49	4
50	4
51	7
52	5
53	5
54	6
55	5
56	6
57	7
58	8
59	4
60	5
61	7
62	7
63	6
64	7
65	8
66	6
67	3
68	6
69	7
70	8
71	5
72	5
73	8
74	3
75	6
76	9
77	5
78	8
79	7
80	5
81	9
82	7
83	7
84	8
85	6
86	5
87	8