A020656 - cp's OEIS frontend

A020656 Lexicographically earliest increasing sequence of nonnegative numbers that contains no arithmetic progression of length 6.

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	6
7	7
8	8
9	9
10	11
11	12
12	13
13	14
14	16
15	17
16	18
17	19
18	21
19	22
20	23
21	24
22	25
23	32
24	33
25	34
26	35
27	36
28	38
29	42
30	43
31	44
32	45
33	46
34	48
35	49
36	50
37	51
38	58
39	59
40	61
41	62
42	63
43	64
44	65
45	67
46	68
47	70
48	72
49	76
50	84
51	86
52	87
53	88
54	89
55	90
56	92
57	95
58	96
59	97
60	98
61	99
62	102
63	103
64	106
65	110
66	113
67	114
68	116
69	117
70	119
71	121

[0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 13, 14, 16, 17, 18, 19, 21, 22, 23, 24, 25, 32, 33, 34, 35, 36, 38, 42, 43, 44, 45, 46, 48, 49, 50, 51, 58, 59, 61, 62, 63, 64, 65, 67, 68, 70, 72, 76, 84, 86, 87, 88, 89, 90, 92, 95, 96, 97, 98, 99, 102, 103, 106, 110, 113, 114, 116, 117, 119, 121]

cp's OEIS Frontend

A020656 Lexicographically earliest increasing sequence of nonnegative numbers that contains no arithmetic progression of length 6.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	6
7	7
8	8
9	9
10	11
11	12
12	13
13	14
14	16
15	17
16	18
17	19
18	21
19	22
20	23
21	24
22	25
23	32
24	33
25	34
26	35
27	36
28	38
29	42
30	43
31	44
32	45
33	46
34	48
35	49
36	50
37	51
38	58
39	59
40	61
41	62
42	63
43	64
44	65
45	67
46	68
47	70
48	72
49	76
50	84
51	86
52	87
53	88
54	89
55	90
56	92
57	95
58	96
59	97
60	98
61	99
62	102
63	103
64	106
65	110
66	113
67	114
68	116
69	117
70	119
71	121

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	6
7	7
8	8
9	9
10	11
11	12
12	13
13	14
14	16
15	17
16	18
17	19
18	21
19	22
20	23
21	24
22	25
23	32
24	33
25	34
26	35
27	36
28	38
29	42
30	43
31	44
32	45
33	46
34	48
35	49
36	50
37	51
38	58
39	59
40	61
41	62
42	63
43	64
44	65
45	67
46	68
47	70
48	72
49	76
50	84
51	86
52	87
53	88
54	89
55	90
56	92
57	95
58	96
59	97
60	98
61	99
62	102
63	103
64	106
65	110
66	113
67	114
68	116
69	117
70	119
71	121

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	6
7	7
8	8
9	9
10	11
11	12
12	13
13	14
14	16
15	17
16	18
17	19
18	21
19	22
20	23
21	24
22	25
23	32
24	33
25	34
26	35
27	36
28	38
29	42
30	43
31	44
32	45
33	46
34	48
35	49
36	50
37	51
38	58
39	59
40	61
41	62
42	63
43	64
44	65
45	67
46	68
47	70
48	72
49	76
50	84
51	86
52	87
53	88
54	89
55	90
56	92
57	95
58	96
59	97
60	98
61	99
62	102
63	103
64	106
65	110
66	113
67	114
68	116
69	117
70	119
71	121