A302389 - cp's OEIS frontend

A302389 A fractal-like sequence: erasing all pairs of contiguous terms that don't have a digit in common leaves the sequence unchanged.

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

[1, 2, 12, 3, 13, 4, 14, 5, 15, 6, 16, 7, 17, 8, 18, 9, 19, 20, 10, 22, 21, 30, 23, 11, 1, 31, 24, 2, 12, 25, 33, 3, 13, 32, 40, 4, 14, 34, 26, 27, 35, 5, 15, 41, 28, 29, 36, 6, 16, 46, 37, 7, 17, 47, 38, 8, 18, 48, 39, 9, 19, 49, 50, 20, 10, 51, 42, 22, 21, 52]

cp's OEIS Frontend

A302389 A fractal-like sequence: erasing all pairs of contiguous terms that don't have a digit in common leaves the sequence unchanged.

Table of values

List of values

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

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

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