A304232 - cp's OEIS frontend

A304232 A fractal-like sequence: erasing all pairs of consecutive terms a(n) and a(n+1) having the property that the last digit of a(n) is the same as the first digit of a(n+1) leaves the sequence unchanged.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	11
12	12
13	11
14	21
15	13
16	12
17	11
18	21
19	22
20	20
21	13
22	12
23	11
24	21
25	22
26	14
27	40
28	20
29	13
30	12
31	11
32	21
33	22
34	14
35	15
36	50
37	40
38	20
39	13
40	12
41	11
42	21
43	22
44	14
45	15
46	16
47	60
48	50
49	40
50	20
51	13
52	12
53	11
54	21
55	22
56	14
57	15
58	16
59	17
60	70
61	60
62	50
63	40
64	20
65	13
66	12
67	11
68	21
69	22
70	14
71	15
72	16
73	17
74	18
75	80

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 11, 21, 13, 12, 11, 21, 22, 20, 13, 12, 11, 21, 22, 14, 40, 20, 13, 12, 11, 21, 22, 14, 15, 50, 40, 20, 13, 12, 11, 21, 22, 14, 15, 16, 60, 50, 40, 20, 13, 12, 11, 21, 22, 14, 15, 16, 17, 70, 60, 50, 40, 20, 13, 12, 11, 21, 22, 14, 15, 16, 17, 18, 80]

cp's OEIS Frontend

A304232 A fractal-like sequence: erasing all pairs of consecutive terms a(n) and a(n+1) having the property that the last digit of a(n) is the same as the first digit of a(n+1) 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	7
8	8
9	9
10	10
11	11
12	12
13	11
14	21
15	13
16	12
17	11
18	21
19	22
20	20
21	13
22	12
23	11
24	21
25	22
26	14
27	40
28	20
29	13
30	12
31	11
32	21
33	22
34	14
35	15
36	50
37	40
38	20
39	13
40	12
41	11
42	21
43	22
44	14
45	15
46	16
47	60
48	50
49	40
50	20
51	13
52	12
53	11
54	21
55	22
56	14
57	15
58	16
59	17
60	70
61	60
62	50
63	40
64	20
65	13
66	12
67	11
68	21
69	22
70	14
71	15
72	16
73	17
74	18
75	80

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	11
12	12
13	11
14	21
15	13
16	12
17	11
18	21
19	22
20	20
21	13
22	12
23	11
24	21
25	22
26	14
27	40
28	20
29	13
30	12
31	11
32	21
33	22
34	14
35	15
36	50
37	40
38	20
39	13
40	12
41	11
42	21
43	22
44	14
45	15
46	16
47	60
48	50
49	40
50	20
51	13
52	12
53	11
54	21
55	22
56	14
57	15
58	16
59	17
60	70
61	60
62	50
63	40
64	20
65	13
66	12
67	11
68	21
69	22
70	14
71	15
72	16
73	17
74	18
75	80

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	11
12	12
13	11
14	21
15	13
16	12
17	11
18	21
19	22
20	20
21	13
22	12
23	11
24	21
25	22
26	14
27	40
28	20
29	13
30	12
31	11
32	21
33	22
34	14
35	15
36	50
37	40
38	20
39	13
40	12
41	11
42	21
43	22
44	14
45	15
46	16
47	60
48	50
49	40
50	20
51	13
52	12
53	11
54	21
55	22
56	14
57	15
58	16
59	17
60	70
61	60
62	50
63	40
64	20
65	13
66	12
67	11
68	21
69	22
70	14
71	15
72	16
73	17
74	18
75	80