A357256 - cp's OEIS frontend

A357256 "Forest Fire" sequence with the additional condition that no progression of the form ABA is allowed for any terms A and B.

n	a(n)
1	1
2	1
3	2
4	2
5	4
6	4
7	5
8	3
9	3
10	5
11	6
12	6
13	7
14	10
15	10
16	7
17	9
18	12
19	11
20	9
21	12
22	8
23	8
24	14
25	14
26	11
27	15
28	13
29	13
30	17
31	23
32	20
33	16
34	15
35	17
36	23
37	24
38	16
39	18
40	18
41	19
42	26
43	21
44	28
45	25
46	19
47	22
48	22
49	29
50	24
51	20
52	30
53	27
54	21
55	32
56	29
57	30
58	35
59	26
60	34
61	36
62	25
63	31
64	32
65	34
66	37
67	39
68	36
69	28
70	27

[1, 1, 2, 2, 4, 4, 5, 3, 3, 5, 6, 6, 7, 10, 10, 7, 9, 12, 11, 9, 12, 8, 8, 14, 14, 11, 15, 13, 13, 17, 23, 20, 16, 15, 17, 23, 24, 16, 18, 18, 19, 26, 21, 28, 25, 19, 22, 22, 29, 24, 20, 30, 27, 21, 32, 29, 30, 35, 26, 34, 36, 25, 31, 32, 34, 37, 39, 36, 28, 27]

cp's OEIS Frontend

A357256 "Forest Fire" sequence with the additional condition that no progression of the form ABA is allowed for any terms A and B.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	2
5	4
6	4
7	5
8	3
9	3
10	5
11	6
12	6
13	7
14	10
15	10
16	7
17	9
18	12
19	11
20	9
21	12
22	8
23	8
24	14
25	14
26	11
27	15
28	13
29	13
30	17
31	23
32	20
33	16
34	15
35	17
36	23
37	24
38	16
39	18
40	18
41	19
42	26
43	21
44	28
45	25
46	19
47	22
48	22
49	29
50	24
51	20
52	30
53	27
54	21
55	32
56	29
57	30
58	35
59	26
60	34
61	36
62	25
63	31
64	32
65	34
66	37
67	39
68	36
69	28
70	27

n	a(n)
1	1
2	1
3	2
4	2
5	4
6	4
7	5
8	3
9	3
10	5
11	6
12	6
13	7
14	10
15	10
16	7
17	9
18	12
19	11
20	9
21	12
22	8
23	8
24	14
25	14
26	11
27	15
28	13
29	13
30	17
31	23
32	20
33	16
34	15
35	17
36	23
37	24
38	16
39	18
40	18
41	19
42	26
43	21
44	28
45	25
46	19
47	22
48	22
49	29
50	24
51	20
52	30
53	27
54	21
55	32
56	29
57	30
58	35
59	26
60	34
61	36
62	25
63	31
64	32
65	34
66	37
67	39
68	36
69	28
70	27

n	a(n)
1	1
2	1
3	2
4	2
5	4
6	4
7	5
8	3
9	3
10	5
11	6
12	6
13	7
14	10
15	10
16	7
17	9
18	12
19	11
20	9
21	12
22	8
23	8
24	14
25	14
26	11
27	15
28	13
29	13
30	17
31	23
32	20
33	16
34	15
35	17
36	23
37	24
38	16
39	18
40	18
41	19
42	26
43	21
44	28
45	25
46	19
47	22
48	22
49	29
50	24
51	20
52	30
53	27
54	21
55	32
56	29
57	30
58	35
59	26
60	34
61	36
62	25
63	31
64	32
65	34
66	37
67	39
68	36
69	28
70	27