A303953 - cp's OEIS frontend

A303953 A fractal-like sequence: erasing all pairs of contiguous terms that sum up to a square leaves the sequence unchanged.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	10
8	4
9	7
10	9
11	5
12	6
13	8
14	17
15	10
16	4
17	7
18	11
19	14
20	9
21	5
22	6
23	8
24	12
25	13
26	17
27	10
28	4
29	7
30	11
31	15
32	21
33	14
34	9
35	5
36	6
37	8
38	12
39	16
40	20
41	13
42	17
43	10
44	4
45	7
46	11
47	15
48	18
49	31
50	21
51	14
52	9
53	5
54	6
55	8
56	12
57	16
58	19
59	30
60	20
61	13
62	17
63	10
64	4
65	7
66	11
67	15
68	18
69	22
70	27
71	31
72	21
73	14

[1, 2, 3, 4, 5, 6, 10, 4, 7, 9, 5, 6, 8, 17, 10, 4, 7, 11, 14, 9, 5, 6, 8, 12, 13, 17, 10, 4, 7, 11, 15, 21, 14, 9, 5, 6, 8, 12, 16, 20, 13, 17, 10, 4, 7, 11, 15, 18, 31, 21, 14, 9, 5, 6, 8, 12, 16, 19, 30, 20, 13, 17, 10, 4, 7, 11, 15, 18, 22, 27, 31, 21, 14]

cp's OEIS Frontend

A303953 A fractal-like sequence: erasing all pairs of contiguous terms that sum up to a square leaves the sequence unchanged.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	10
8	4
9	7
10	9
11	5
12	6
13	8
14	17
15	10
16	4
17	7
18	11
19	14
20	9
21	5
22	6
23	8
24	12
25	13
26	17
27	10
28	4
29	7
30	11
31	15
32	21
33	14
34	9
35	5
36	6
37	8
38	12
39	16
40	20
41	13
42	17
43	10
44	4
45	7
46	11
47	15
48	18
49	31
50	21
51	14
52	9
53	5
54	6
55	8
56	12
57	16
58	19
59	30
60	20
61	13
62	17
63	10
64	4
65	7
66	11
67	15
68	18
69	22
70	27
71	31
72	21
73	14

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	10
8	4
9	7
10	9
11	5
12	6
13	8
14	17
15	10
16	4
17	7
18	11
19	14
20	9
21	5
22	6
23	8
24	12
25	13
26	17
27	10
28	4
29	7
30	11
31	15
32	21
33	14
34	9
35	5
36	6
37	8
38	12
39	16
40	20
41	13
42	17
43	10
44	4
45	7
46	11
47	15
48	18
49	31
50	21
51	14
52	9
53	5
54	6
55	8
56	12
57	16
58	19
59	30
60	20
61	13
62	17
63	10
64	4
65	7
66	11
67	15
68	18
69	22
70	27
71	31
72	21
73	14

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	10
8	4
9	7
10	9
11	5
12	6
13	8
14	17
15	10
16	4
17	7
18	11
19	14
20	9
21	5
22	6
23	8
24	12
25	13
26	17
27	10
28	4
29	7
30	11
31	15
32	21
33	14
34	9
35	5
36	6
37	8
38	12
39	16
40	20
41	13
42	17
43	10
44	4
45	7
46	11
47	15
48	18
49	31
50	21
51	14
52	9
53	5
54	6
55	8
56	12
57	16
58	19
59	30
60	20
61	13
62	17
63	10
64	4
65	7
66	11
67	15
68	18
69	22
70	27
71	31
72	21
73	14