A267303 - cp's OEIS frontend

A267303 Earliest positive increasing sequence having no 6-term subsequence with constant second differences.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	10
10	12
11	13
12	14
13	15
14	18
15	20
16	21
17	22
18	25
19	26
20	28
21	35
22	36
23	39
24	41
25	43
26	46
27	47
28	49
29	54
30	55
31	56
32	64
33	68
34	74
35	75
36	81
37	83
38	84
39	85
40	87
41	88
42	90
43	91
44	93
45	95
46	103
47	108
48	109
49	111
50	118
51	129
52	134
53	137
54	140
55	144
56	145
57	150
58	151
59	152
60	153

[1, 2, 3, 4, 5, 7, 8, 9, 10, 12, 13, 14, 15, 18, 20, 21, 22, 25, 26, 28, 35, 36, 39, 41, 43, 46, 47, 49, 54, 55, 56, 64, 68, 74, 75, 81, 83, 84, 85, 87, 88, 90, 91, 93, 95, 103, 108, 109, 111, 118, 129, 134, 137, 140, 144, 145, 150, 151, 152, 153]

cp's OEIS Frontend

A267303 Earliest positive increasing sequence having no 6-term subsequence with constant second differences.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	10
10	12
11	13
12	14
13	15
14	18
15	20
16	21
17	22
18	25
19	26
20	28
21	35
22	36
23	39
24	41
25	43
26	46
27	47
28	49
29	54
30	55
31	56
32	64
33	68
34	74
35	75
36	81
37	83
38	84
39	85
40	87
41	88
42	90
43	91
44	93
45	95
46	103
47	108
48	109
49	111
50	118
51	129
52	134
53	137
54	140
55	144
56	145
57	150
58	151
59	152
60	153

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	10
10	12
11	13
12	14
13	15
14	18
15	20
16	21
17	22
18	25
19	26
20	28
21	35
22	36
23	39
24	41
25	43
26	46
27	47
28	49
29	54
30	55
31	56
32	64
33	68
34	74
35	75
36	81
37	83
38	84
39	85
40	87
41	88
42	90
43	91
44	93
45	95
46	103
47	108
48	109
49	111
50	118
51	129
52	134
53	137
54	140
55	144
56	145
57	150
58	151
59	152
60	153

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	10
10	12
11	13
12	14
13	15
14	18
15	20
16	21
17	22
18	25
19	26
20	28
21	35
22	36
23	39
24	41
25	43
26	46
27	47
28	49
29	54
30	55
31	56
32	64
33	68
34	74
35	75
36	81
37	83
38	84
39	85
40	87
41	88
42	90
43	91
44	93
45	95
46	103
47	108
48	109
49	111
50	118
51	129
52	134
53	137
54	140
55	144
56	145
57	150
58	151
59	152
60	153