A242921 - cp's OEIS frontend

A242921 Lexicographically least increasing sequence avoiding double 3-term arithmetic progressions.

n	a(n)
0	0
1	1
2	3
3	4
4	7
5	8
6	10
7	11
8	15
9	17
10	18
11	20
12	25
13	27
14	28
15	31
16	32
17	34
18	35
19	38
20	42
21	43
22	45
23	46
24	53
25	55
26	58
27	59
28	61
29	62
30	67
31	68
32	70
33	71
34	79
35	81
36	85
37	87
38	90
39	92
40	93
41	98
42	102
43	105
44	112
45	114
46	115
47	119
48	121
49	126
50	129
51	130
52	132
53	133
54	136
55	140
56	141
57	143
58	144
59	148

[0, 1, 3, 4, 7, 8, 10, 11, 15, 17, 18, 20, 25, 27, 28, 31, 32, 34, 35, 38, 42, 43, 45, 46, 53, 55, 58, 59, 61, 62, 67, 68, 70, 71, 79, 81, 85, 87, 90, 92, 93, 98, 102, 105, 112, 114, 115, 119, 121, 126, 129, 130, 132, 133, 136, 140, 141, 143, 144, 148]

cp's OEIS Frontend

A242921 Lexicographically least increasing sequence avoiding double 3-term arithmetic progressions.

Table of values

List of values

n	a(n)
0	0
1	1
2	3
3	4
4	7
5	8
6	10
7	11
8	15
9	17
10	18
11	20
12	25
13	27
14	28
15	31
16	32
17	34
18	35
19	38
20	42
21	43
22	45
23	46
24	53
25	55
26	58
27	59
28	61
29	62
30	67
31	68
32	70
33	71
34	79
35	81
36	85
37	87
38	90
39	92
40	93
41	98
42	102
43	105
44	112
45	114
46	115
47	119
48	121
49	126
50	129
51	130
52	132
53	133
54	136
55	140
56	141
57	143
58	144
59	148

n	a(n)
0	0
1	1
2	3
3	4
4	7
5	8
6	10
7	11
8	15
9	17
10	18
11	20
12	25
13	27
14	28
15	31
16	32
17	34
18	35
19	38
20	42
21	43
22	45
23	46
24	53
25	55
26	58
27	59
28	61
29	62
30	67
31	68
32	70
33	71
34	79
35	81
36	85
37	87
38	90
39	92
40	93
41	98
42	102
43	105
44	112
45	114
46	115
47	119
48	121
49	126
50	129
51	130
52	132
53	133
54	136
55	140
56	141
57	143
58	144
59	148

n	a(n)
0	0
1	1
2	3
3	4
4	7
5	8
6	10
7	11
8	15
9	17
10	18
11	20
12	25
13	27
14	28
15	31
16	32
17	34
18	35
19	38
20	42
21	43
22	45
23	46
24	53
25	55
26	58
27	59
28	61
29	62
30	67
31	68
32	70
33	71
34	79
35	81
36	85
37	87
38	90
39	92
40	93
41	98
42	102
43	105
44	112
45	114
46	115
47	119
48	121
49	126
50	129
51	130
52	132
53	133
54	136
55	140
56	141
57	143
58	144
59	148