A333921 - cp's OEIS frontend

A333921 a(n) is the least k such that the decimal representation of n appears as a substring in the concatenation of 0, 1, ..., k.

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	11
12	2
13	13
14	14
15	15
16	16
17	17
18	18
19	19
20	20
21	13
22	22
23	3
24	24
25	25
26	26
27	27
28	28
29	29
30	30
31	14
32	24
33	33
34	4
35	35
36	36
37	37
38	38
39	39
40	40
41	15
42	25
43	35
44	44
45	5
46	46
47	47
48	48
49	49
50	50
51	16
52	26
53	36
54	46
55	55
56	6
57	57
58	58
59	59
60	60
61	17
62	27
63	37
64	47
65	57
66	66
67	7
68	68

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 2, 13, 14, 15, 16, 17, 18, 19, 20, 13, 22, 3, 24, 25, 26, 27, 28, 29, 30, 14, 24, 33, 4, 35, 36, 37, 38, 39, 40, 15, 25, 35, 44, 5, 46, 47, 48, 49, 50, 16, 26, 36, 46, 55, 6, 57, 58, 59, 60, 17, 27, 37, 47, 57, 66, 7, 68]

cp's OEIS Frontend

A333921 a(n) is the least k such that the decimal representation of n appears as a substring in the concatenation of 0, 1, ..., k.

Table of values

List of values

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	11
12	2
13	13
14	14
15	15
16	16
17	17
18	18
19	19
20	20
21	13
22	22
23	3
24	24
25	25
26	26
27	27
28	28
29	29
30	30
31	14
32	24
33	33
34	4
35	35
36	36
37	37
38	38
39	39
40	40
41	15
42	25
43	35
44	44
45	5
46	46
47	47
48	48
49	49
50	50
51	16
52	26
53	36
54	46
55	55
56	6
57	57
58	58
59	59
60	60
61	17
62	27
63	37
64	47
65	57
66	66
67	7
68	68

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	11
12	2
13	13
14	14
15	15
16	16
17	17
18	18
19	19
20	20
21	13
22	22
23	3
24	24
25	25
26	26
27	27
28	28
29	29
30	30
31	14
32	24
33	33
34	4
35	35
36	36
37	37
38	38
39	39
40	40
41	15
42	25
43	35
44	44
45	5
46	46
47	47
48	48
49	49
50	50
51	16
52	26
53	36
54	46
55	55
56	6
57	57
58	58
59	59
60	60
61	17
62	27
63	37
64	47
65	57
66	66
67	7
68	68

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	11
12	2
13	13
14	14
15	15
16	16
17	17
18	18
19	19
20	20
21	13
22	22
23	3
24	24
25	25
26	26
27	27
28	28
29	29
30	30
31	14
32	24
33	33
34	4
35	35
36	36
37	37
38	38
39	39
40	40
41	15
42	25
43	35
44	44
45	5
46	46
47	47
48	48
49	49
50	50
51	16
52	26
53	36
54	46
55	55
56	6
57	57
58	58
59	59
60	60
61	17
62	27
63	37
64	47
65	57
66	66
67	7
68	68