A309890 - cp's OEIS frontend

A309890 Lexicographically earliest sequence of positive integers without triples in weakly increasing arithmetic progression.

n	a(n)
1	1
2	1
3	2
4	1
5	1
6	2
7	2
8	4
9	4
10	1
11	1
12	2
13	1
14	1
15	2
16	2
17	4
18	4
19	2
20	4
21	4
22	5
23	5
24	8
25	5
26	5
27	9
28	1
29	1
30	2
31	1
32	1
33	2
34	2
35	4
36	4
37	1
38	1
39	2
40	1
41	1
42	2
43	2
44	4
45	4
46	2
47	4
48	4
49	5
50	5
51	8
52	5
53	5
54	9
55	2
56	4
57	4
58	5
59	5
60	10
61	5
62	5
63	10
64	10
65	11
66	13
67	10
68	11
69	10
70	11
71	13
72	10
73	10
74	12
75	13
76	10
77	13
78	11
79	12
80	20
81	11
82	1
83	1
84	2
85	1
86	1
87	2
88	2
89	4
90	4
91	1
92	1
93	2
94	1
95	1
96	2
97	2
98	4
99	4
100	2

[1, 1, 2, 1, 1, 2, 2, 4, 4, 1, 1, 2, 1, 1, 2, 2, 4, 4, 2, 4, 4, 5, 5, 8, 5, 5, 9, 1, 1, 2, 1, 1, 2, 2, 4, 4, 1, 1, 2, 1, 1, 2, 2, 4, 4, 2, 4, 4, 5, 5, 8, 5, 5, 9, 2, 4, 4, 5, 5, 10, 5, 5, 10, 10, 11, 13, 10, 11, 10, 11, 13, 10, 10, 12, 13, 10, 13, 11, 12, 20, 11, 1, 1, 2, 1, 1, 2, 2, 4, 4, 1, 1, 2, 1, 1, 2, 2, 4, 4, 2]

cp's OEIS Frontend

A309890 Lexicographically earliest sequence of positive integers without triples in weakly increasing arithmetic progression.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	1
5	1
6	2
7	2
8	4
9	4
10	1
11	1
12	2
13	1
14	1
15	2
16	2
17	4
18	4
19	2
20	4
21	4
22	5
23	5
24	8
25	5
26	5
27	9
28	1
29	1
30	2
31	1
32	1
33	2
34	2
35	4
36	4
37	1
38	1
39	2
40	1
41	1
42	2
43	2
44	4
45	4
46	2
47	4
48	4
49	5
50	5
51	8
52	5
53	5
54	9
55	2
56	4
57	4
58	5
59	5
60	10
61	5
62	5
63	10
64	10
65	11
66	13
67	10
68	11
69	10
70	11
71	13
72	10
73	10
74	12
75	13
76	10
77	13
78	11
79	12
80	20
81	11
82	1
83	1
84	2
85	1
86	1
87	2
88	2
89	4
90	4
91	1
92	1
93	2
94	1
95	1
96	2
97	2
98	4
99	4
100	2

n	a(n)
1	1
2	1
3	2
4	1
5	1
6	2
7	2
8	4
9	4
10	1
11	1
12	2
13	1
14	1
15	2
16	2
17	4
18	4
19	2
20	4
21	4
22	5
23	5
24	8
25	5
26	5
27	9
28	1
29	1
30	2
31	1
32	1
33	2
34	2
35	4
36	4
37	1
38	1
39	2
40	1
41	1
42	2
43	2
44	4
45	4
46	2
47	4
48	4
49	5
50	5
51	8
52	5
53	5
54	9
55	2
56	4
57	4
58	5
59	5
60	10
61	5
62	5
63	10
64	10
65	11
66	13
67	10
68	11
69	10
70	11
71	13
72	10
73	10
74	12
75	13
76	10
77	13
78	11
79	12
80	20
81	11
82	1
83	1
84	2
85	1
86	1
87	2
88	2
89	4
90	4
91	1
92	1
93	2
94	1
95	1
96	2
97	2
98	4
99	4
100	2

n	a(n)
1	1
2	1
3	2
4	1
5	1
6	2
7	2
8	4
9	4
10	1
11	1
12	2
13	1
14	1
15	2
16	2
17	4
18	4
19	2
20	4
21	4
22	5
23	5
24	8
25	5
26	5
27	9
28	1
29	1
30	2
31	1
32	1
33	2
34	2
35	4
36	4
37	1
38	1
39	2
40	1
41	1
42	2
43	2
44	4
45	4
46	2
47	4
48	4
49	5
50	5
51	8
52	5
53	5
54	9
55	2
56	4
57	4
58	5
59	5
60	10
61	5
62	5
63	10
64	10
65	11
66	13
67	10
68	11
69	10
70	11
71	13
72	10
73	10
74	12
75	13
76	10
77	13
78	11
79	12
80	20
81	11
82	1
83	1
84	2
85	1
86	1
87	2
88	2
89	4
90	4
91	1
92	1
93	2
94	1
95	1
96	2
97	2
98	4
99	4
100	2