A005837 - cp's OEIS frontend

A005837 Lexicographically earliest increasing sequence of positive numbers that contains no 4-term arithmetic progression.

n	a(n)
1	1
2	2
3	3
4	5
5	6
6	8
7	9
8	10
9	15
10	16
11	17
12	19
13	26
14	27
15	29
16	30
17	31
18	34
19	37
20	49
21	50
22	51
23	53
24	54
25	56
26	57
27	58
28	63
29	65
30	66
31	67
32	80
33	87
34	88
35	89
36	91
37	94
38	99
39	102
40	105
41	106
42	109
43	110
44	111
45	122
46	126
47	136
48	145
49	149
50	151
51	152
52	160
53	163
54	167
55	169
56	170
57	171
58	174
59	176
60	177
61	183
62	187
63	188
64	194
65	196

[1, 2, 3, 5, 6, 8, 9, 10, 15, 16, 17, 19, 26, 27, 29, 30, 31, 34, 37, 49, 50, 51, 53, 54, 56, 57, 58, 63, 65, 66, 67, 80, 87, 88, 89, 91, 94, 99, 102, 105, 106, 109, 110, 111, 122, 126, 136, 145, 149, 151, 152, 160, 163, 167, 169, 170, 171, 174, 176, 177, 183, 187, 188, 194, 196]

cp's OEIS Frontend

A005837 Lexicographically earliest increasing sequence of positive numbers that contains no 4-term arithmetic progression.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	5
5	6
6	8
7	9
8	10
9	15
10	16
11	17
12	19
13	26
14	27
15	29
16	30
17	31
18	34
19	37
20	49
21	50
22	51
23	53
24	54
25	56
26	57
27	58
28	63
29	65
30	66
31	67
32	80
33	87
34	88
35	89
36	91
37	94
38	99
39	102
40	105
41	106
42	109
43	110
44	111
45	122
46	126
47	136
48	145
49	149
50	151
51	152
52	160
53	163
54	167
55	169
56	170
57	171
58	174
59	176
60	177
61	183
62	187
63	188
64	194
65	196

n	a(n)
1	1
2	2
3	3
4	5
5	6
6	8
7	9
8	10
9	15
10	16
11	17
12	19
13	26
14	27
15	29
16	30
17	31
18	34
19	37
20	49
21	50
22	51
23	53
24	54
25	56
26	57
27	58
28	63
29	65
30	66
31	67
32	80
33	87
34	88
35	89
36	91
37	94
38	99
39	102
40	105
41	106
42	109
43	110
44	111
45	122
46	126
47	136
48	145
49	149
50	151
51	152
52	160
53	163
54	167
55	169
56	170
57	171
58	174
59	176
60	177
61	183
62	187
63	188
64	194
65	196

n	a(n)
1	1
2	2
3	3
4	5
5	6
6	8
7	9
8	10
9	15
10	16
11	17
12	19
13	26
14	27
15	29
16	30
17	31
18	34
19	37
20	49
21	50
22	51
23	53
24	54
25	56
26	57
27	58
28	63
29	65
30	66
31	67
32	80
33	87
34	88
35	89
36	91
37	94
38	99
39	102
40	105
41	106
42	109
43	110
44	111
45	122
46	126
47	136
48	145
49	149
50	151
51	152
52	160
53	163
54	167
55	169
56	170
57	171
58	174
59	176
60	177
61	183
62	187
63	188
64	194
65	196