A106001 - cp's OEIS frontend

A106001 Start S with 1; extend S with a(n) such that a(n) is the smallest unused integer so far that ends with the a(n)-th digit of S.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	11
11	21
12	12
13	31
14	41
15	22
16	13
17	51
18	14
19	61
20	32
21	42
22	71
23	23
24	15
25	81
26	91
27	24
28	16
29	101
30	33
31	52
32	34
33	62
34	17
35	111
36	72
37	43
38	121
39	25
40	18
41	131
42	19
43	141
44	82
45	44
46	151
47	26
48	161
49	10
50	171
51	53
52	63
53	35
54	92
55	73
56	54
57	36
58	102
59	181
60	27
61	191
62	201
63	211
64	37
65	112
66	64

[1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 21, 12, 31, 41, 22, 13, 51, 14, 61, 32, 42, 71, 23, 15, 81, 91, 24, 16, 101, 33, 52, 34, 62, 17, 111, 72, 43, 121, 25, 18, 131, 19, 141, 82, 44, 151, 26, 161, 10, 171, 53, 63, 35, 92, 73, 54, 36, 102, 181, 27, 191, 201, 211, 37, 112, 64]

cp's OEIS Frontend

A106001 Start S with 1; extend S with a(n) such that a(n) is the smallest unused integer so far that ends with the a(n)-th digit of S.

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	11
11	21
12	12
13	31
14	41
15	22
16	13
17	51
18	14
19	61
20	32
21	42
22	71
23	23
24	15
25	81
26	91
27	24
28	16
29	101
30	33
31	52
32	34
33	62
34	17
35	111
36	72
37	43
38	121
39	25
40	18
41	131
42	19
43	141
44	82
45	44
46	151
47	26
48	161
49	10
50	171
51	53
52	63
53	35
54	92
55	73
56	54
57	36
58	102
59	181
60	27
61	191
62	201
63	211
64	37
65	112
66	64

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	11
11	21
12	12
13	31
14	41
15	22
16	13
17	51
18	14
19	61
20	32
21	42
22	71
23	23
24	15
25	81
26	91
27	24
28	16
29	101
30	33
31	52
32	34
33	62
34	17
35	111
36	72
37	43
38	121
39	25
40	18
41	131
42	19
43	141
44	82
45	44
46	151
47	26
48	161
49	10
50	171
51	53
52	63
53	35
54	92
55	73
56	54
57	36
58	102
59	181
60	27
61	191
62	201
63	211
64	37
65	112
66	64

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	11
11	21
12	12
13	31
14	41
15	22
16	13
17	51
18	14
19	61
20	32
21	42
22	71
23	23
24	15
25	81
26	91
27	24
28	16
29	101
30	33
31	52
32	34
33	62
34	17
35	111
36	72
37	43
38	121
39	25
40	18
41	131
42	19
43	141
44	82
45	44
46	151
47	26
48	161
49	10
50	171
51	53
52	63
53	35
54	92
55	73
56	54
57	36
58	102
59	181
60	27
61	191
62	201
63	211
64	37
65	112
66	64