A348190 - cp's OEIS frontend

A348190 Positive integers where each is chosen to be the second smallest number subject to the condition that no three terms a(j), a(j+k), a(j+2*k) (for any j and k) form an arithmetic progression.

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

[2, 2, 3, 2, 3, 3, 4, 2, 2, 5, 3, 4, 3, 5, 5, 7, 5, 2, 4, 2, 2, 5, 4, 6, 3, 2, 9, 5, 9, 3, 6, 10, 9, 9, 6, 5, 7, 4, 12, 11, 11, 2, 6, 4, 8, 3, 4, 6, 7, 13, 11, 5, 5, 6, 4, 8, 10, 9, 13, 4, 13, 4, 6, 6, 2, 11, 5, 4, 6, 11, 18, 9, 15, 2, 15, 12]

cp's OEIS Frontend

A348190 Positive integers where each is chosen to be the second smallest number subject to the condition that no three terms a(j), a(j+k), a(j+2*k) (for any j and k) form an arithmetic progression.

Table of values

List of values

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

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

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