A020654 - cp's OEIS frontend

A020654 Lexicographically earliest infinite increasing sequence of nonnegative numbers containing no 5-term arithmetic progression.

n	a(n)
1	0
2	1
3	2
4	3
5	5
6	6
7	7
8	8
9	10
10	11
11	12
12	13
13	15
14	16
15	17
16	18
17	25
18	26
19	27
20	28
21	30
22	31
23	32
24	33
25	35
26	36
27	37
28	38
29	40
30	41
31	42
32	43
33	50
34	51
35	52
36	53
37	55
38	56
39	57
40	58
41	60
42	61
43	62
44	63
45	65
46	66
47	67
48	68
49	75
50	76
51	77
52	78
53	80
54	81
55	82
56	83
57	85
58	86
59	87
60	88
61	90
62	91
63	92
64	93
65	125
66	126
67	127

[0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18, 25, 26, 27, 28, 30, 31, 32, 33, 35, 36, 37, 38, 40, 41, 42, 43, 50, 51, 52, 53, 55, 56, 57, 58, 60, 61, 62, 63, 65, 66, 67, 68, 75, 76, 77, 78, 80, 81, 82, 83, 85, 86, 87, 88, 90, 91, 92, 93, 125, 126, 127]

cp's OEIS Frontend

A020654 Lexicographically earliest infinite increasing sequence of nonnegative numbers containing no 5-term arithmetic progression.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	3
5	5
6	6
7	7
8	8
9	10
10	11
11	12
12	13
13	15
14	16
15	17
16	18
17	25
18	26
19	27
20	28
21	30
22	31
23	32
24	33
25	35
26	36
27	37
28	38
29	40
30	41
31	42
32	43
33	50
34	51
35	52
36	53
37	55
38	56
39	57
40	58
41	60
42	61
43	62
44	63
45	65
46	66
47	67
48	68
49	75
50	76
51	77
52	78
53	80
54	81
55	82
56	83
57	85
58	86
59	87
60	88
61	90
62	91
63	92
64	93
65	125
66	126
67	127

n	a(n)
1	0
2	1
3	2
4	3
5	5
6	6
7	7
8	8
9	10
10	11
11	12
12	13
13	15
14	16
15	17
16	18
17	25
18	26
19	27
20	28
21	30
22	31
23	32
24	33
25	35
26	36
27	37
28	38
29	40
30	41
31	42
32	43
33	50
34	51
35	52
36	53
37	55
38	56
39	57
40	58
41	60
42	61
43	62
44	63
45	65
46	66
47	67
48	68
49	75
50	76
51	77
52	78
53	80
54	81
55	82
56	83
57	85
58	86
59	87
60	88
61	90
62	91
63	92
64	93
65	125
66	126
67	127

n	a(n)
1	0
2	1
3	2
4	3
5	5
6	6
7	7
8	8
9	10
10	11
11	12
12	13
13	15
14	16
15	17
16	18
17	25
18	26
19	27
20	28
21	30
22	31
23	32
24	33
25	35
26	36
27	37
28	38
29	40
30	41
31	42
32	43
33	50
34	51
35	52
36	53
37	55
38	56
39	57
40	58
41	60
42	61
43	62
44	63
45	65
46	66
47	67
48	68
49	75
50	76
51	77
52	78
53	80
54	81
55	82
56	83
57	85
58	86
59	87
60	88
61	90
62	91
63	92
64	93
65	125
66	126
67	127