A303951 - cp's OEIS frontend

A303951 A fractal-like sequence: erasing all pairs of contiguous terms that don't sum up to a Fibonacci number leaves the sequence unchanged.

n	a(n)
1	1
2	2
3	3
4	4
5	9
6	5
7	3
8	10
9	6
10	7
11	8
12	13
13	11
14	23
15	12
16	22
17	14
18	20
19	15
20	19
21	16
22	18
23	17
24	4
25	9
26	25
27	21
28	34
29	24
30	31
31	26
32	29
33	27
34	28
35	30
36	59
37	32
38	57
39	33
40	56
41	35
42	54
43	36
44	53
45	37
46	52
47	38
48	51
49	39
50	50
51	40
52	49
53	41
54	48
55	42
56	47
57	43
58	46
59	44
60	45
61	55
62	89
63	58
64	86
65	60
66	84
67	61
68	83

[1, 2, 3, 4, 9, 5, 3, 10, 6, 7, 8, 13, 11, 23, 12, 22, 14, 20, 15, 19, 16, 18, 17, 4, 9, 25, 21, 34, 24, 31, 26, 29, 27, 28, 30, 59, 32, 57, 33, 56, 35, 54, 36, 53, 37, 52, 38, 51, 39, 50, 40, 49, 41, 48, 42, 47, 43, 46, 44, 45, 55, 89, 58, 86, 60, 84, 61, 83]

cp's OEIS Frontend

A303951 A fractal-like sequence: erasing all pairs of contiguous terms that don't sum up to a Fibonacci number leaves the sequence unchanged.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	9
6	5
7	3
8	10
9	6
10	7
11	8
12	13
13	11
14	23
15	12
16	22
17	14
18	20
19	15
20	19
21	16
22	18
23	17
24	4
25	9
26	25
27	21
28	34
29	24
30	31
31	26
32	29
33	27
34	28
35	30
36	59
37	32
38	57
39	33
40	56
41	35
42	54
43	36
44	53
45	37
46	52
47	38
48	51
49	39
50	50
51	40
52	49
53	41
54	48
55	42
56	47
57	43
58	46
59	44
60	45
61	55
62	89
63	58
64	86
65	60
66	84
67	61
68	83

n	a(n)
1	1
2	2
3	3
4	4
5	9
6	5
7	3
8	10
9	6
10	7
11	8
12	13
13	11
14	23
15	12
16	22
17	14
18	20
19	15
20	19
21	16
22	18
23	17
24	4
25	9
26	25
27	21
28	34
29	24
30	31
31	26
32	29
33	27
34	28
35	30
36	59
37	32
38	57
39	33
40	56
41	35
42	54
43	36
44	53
45	37
46	52
47	38
48	51
49	39
50	50
51	40
52	49
53	41
54	48
55	42
56	47
57	43
58	46
59	44
60	45
61	55
62	89
63	58
64	86
65	60
66	84
67	61
68	83

n	a(n)
1	1
2	2
3	3
4	4
5	9
6	5
7	3
8	10
9	6
10	7
11	8
12	13
13	11
14	23
15	12
16	22
17	14
18	20
19	15
20	19
21	16
22	18
23	17
24	4
25	9
26	25
27	21
28	34
29	24
30	31
31	26
32	29
33	27
34	28
35	30
36	59
37	32
38	57
39	33
40	56
41	35
42	54
43	36
44	53
45	37
46	52
47	38
48	51
49	39
50	50
51	40
52	49
53	41
54	48
55	42
56	47
57	43
58	46
59	44
60	45
61	55
62	89
63	58
64	86
65	60
66	84
67	61
68	83