A162501 - cp's OEIS frontend

A162501 Lexicographically earliest permutation of the natural numbers such that in decimal representation the initial digit for each term is equal to the last nonzero digit of its predecessor; a(1)=1.

n	a(n)
1	1
2	10
3	11
4	12
5	2
6	20
7	21
8	13
9	3
10	30
11	31
12	14
13	4
14	40
15	41
16	15
17	5
18	50
19	51
20	16
21	6
22	60
23	61
24	17
25	7
26	70
27	71
28	18
29	8
30	80
31	81
32	19
33	9
34	90
35	91
36	100
37	101
38	102
39	22
40	23
41	32
42	24
43	42
44	25
45	52
46	26
47	62
48	27
49	72
50	28
51	82
52	29
53	92
54	200
55	201
56	103
57	33
58	34
59	43
60	35
61	53
62	36
63	63
64	37
65	73
66	38
67	83
68	39
69	93
70	300
71	301

[1, 10, 11, 12, 2, 20, 21, 13, 3, 30, 31, 14, 4, 40, 41, 15, 5, 50, 51, 16, 6, 60, 61, 17, 7, 70, 71, 18, 8, 80, 81, 19, 9, 90, 91, 100, 101, 102, 22, 23, 32, 24, 42, 25, 52, 26, 62, 27, 72, 28, 82, 29, 92, 200, 201, 103, 33, 34, 43, 35, 53, 36, 63, 37, 73, 38, 83, 39, 93, 300, 301]

cp's OEIS Frontend

A162501 Lexicographically earliest permutation of the natural numbers such that in decimal representation the initial digit for each term is equal to the last nonzero digit of its predecessor; a(1)=1.

Table of values

List of values

n	a(n)
1	1
2	10
3	11
4	12
5	2
6	20
7	21
8	13
9	3
10	30
11	31
12	14
13	4
14	40
15	41
16	15
17	5
18	50
19	51
20	16
21	6
22	60
23	61
24	17
25	7
26	70
27	71
28	18
29	8
30	80
31	81
32	19
33	9
34	90
35	91
36	100
37	101
38	102
39	22
40	23
41	32
42	24
43	42
44	25
45	52
46	26
47	62
48	27
49	72
50	28
51	82
52	29
53	92
54	200
55	201
56	103
57	33
58	34
59	43
60	35
61	53
62	36
63	63
64	37
65	73
66	38
67	83
68	39
69	93
70	300
71	301

n	a(n)
1	1
2	10
3	11
4	12
5	2
6	20
7	21
8	13
9	3
10	30
11	31
12	14
13	4
14	40
15	41
16	15
17	5
18	50
19	51
20	16
21	6
22	60
23	61
24	17
25	7
26	70
27	71
28	18
29	8
30	80
31	81
32	19
33	9
34	90
35	91
36	100
37	101
38	102
39	22
40	23
41	32
42	24
43	42
44	25
45	52
46	26
47	62
48	27
49	72
50	28
51	82
52	29
53	92
54	200
55	201
56	103
57	33
58	34
59	43
60	35
61	53
62	36
63	63
64	37
65	73
66	38
67	83
68	39
69	93
70	300
71	301

n	a(n)
1	1
2	10
3	11
4	12
5	2
6	20
7	21
8	13
9	3
10	30
11	31
12	14
13	4
14	40
15	41
16	15
17	5
18	50
19	51
20	16
21	6
22	60
23	61
24	17
25	7
26	70
27	71
28	18
29	8
30	80
31	81
32	19
33	9
34	90
35	91
36	100
37	101
38	102
39	22
40	23
41	32
42	24
43	42
44	25
45	52
46	26
47	62
48	27
49	72
50	28
51	82
52	29
53	92
54	200
55	201
56	103
57	33
58	34
59	43
60	35
61	53
62	36
63	63
64	37
65	73
66	38
67	83
68	39
69	93
70	300
71	301