A020655 - cp's OEIS frontend

A020655 Lexicographically earliest increasing sequence of positive numbers that contains no arithmetic progression of length 5.

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	7
7	8
8	9
9	11
10	12
11	13
12	14
13	16
14	17
15	18
16	19
17	26
18	27
19	28
20	29
21	31
22	32
23	33
24	34
25	36
26	37
27	38
28	39
29	41
30	42
31	43
32	44
33	51
34	52
35	53
36	54
37	56
38	57
39	58
40	59
41	61
42	62
43	63
44	64
45	66
46	67
47	68
48	69
49	76
50	77
51	78
52	79
53	81
54	82
55	83
56	84
57	86
58	87
59	88
60	89
61	91
62	92
63	93
64	94
65	126
66	127
67	128
68	129
69	131
70	132
71	133

[1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 13, 14, 16, 17, 18, 19, 26, 27, 28, 29, 31, 32, 33, 34, 36, 37, 38, 39, 41, 42, 43, 44, 51, 52, 53, 54, 56, 57, 58, 59, 61, 62, 63, 64, 66, 67, 68, 69, 76, 77, 78, 79, 81, 82, 83, 84, 86, 87, 88, 89, 91, 92, 93, 94, 126, 127, 128, 129, 131, 132, 133]

cp's OEIS Frontend

A020655 Lexicographically earliest increasing sequence of positive numbers that contains no arithmetic progression of length 5.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	7
7	8
8	9
9	11
10	12
11	13
12	14
13	16
14	17
15	18
16	19
17	26
18	27
19	28
20	29
21	31
22	32
23	33
24	34
25	36
26	37
27	38
28	39
29	41
30	42
31	43
32	44
33	51
34	52
35	53
36	54
37	56
38	57
39	58
40	59
41	61
42	62
43	63
44	64
45	66
46	67
47	68
48	69
49	76
50	77
51	78
52	79
53	81
54	82
55	83
56	84
57	86
58	87
59	88
60	89
61	91
62	92
63	93
64	94
65	126
66	127
67	128
68	129
69	131
70	132
71	133

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	7
7	8
8	9
9	11
10	12
11	13
12	14
13	16
14	17
15	18
16	19
17	26
18	27
19	28
20	29
21	31
22	32
23	33
24	34
25	36
26	37
27	38
28	39
29	41
30	42
31	43
32	44
33	51
34	52
35	53
36	54
37	56
38	57
39	58
40	59
41	61
42	62
43	63
44	64
45	66
46	67
47	68
48	69
49	76
50	77
51	78
52	79
53	81
54	82
55	83
56	84
57	86
58	87
59	88
60	89
61	91
62	92
63	93
64	94
65	126
66	127
67	128
68	129
69	131
70	132
71	133

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	7
7	8
8	9
9	11
10	12
11	13
12	14
13	16
14	17
15	18
16	19
17	26
18	27
19	28
20	29
21	31
22	32
23	33
24	34
25	36
26	37
27	38
28	39
29	41
30	42
31	43
32	44
33	51
34	52
35	53
36	54
37	56
38	57
39	58
40	59
41	61
42	62
43	63
44	64
45	66
46	67
47	68
48	69
49	76
50	77
51	78
52	79
53	81
54	82
55	83
56	84
57	86
58	87
59	88
60	89
61	91
62	92
63	93
64	94
65	126
66	127
67	128
68	129
69	131
70	132
71	133