A116700 - cp's OEIS frontend

A116700 "Early bird" numbers: write the natural numbers in a string 12345678910111213.... Sequence gives numbers that occur in the string ahead of their natural place, sorted into increasing order (cf. A117804).

n	a(n)
1	12
2	21
3	23
4	31
5	32
6	34
7	41
8	42
9	43
10	45
11	51
12	52
13	53
14	54
15	56
16	61
17	62
18	63
19	64
20	65
21	67
22	71
23	72
24	73
25	74
26	75
27	76
28	78
29	81
30	82
31	83
32	84
33	85
34	86
35	87
36	89
37	91
38	92
39	93
40	94
41	95
42	96
43	97
44	98
45	99
46	101
47	110
48	111
49	112
50	121
51	122
52	123
53	131
54	132
55	141
56	142
57	151
58	152
59	161
60	162
61	171

[12, 21, 23, 31, 32, 34, 41, 42, 43, 45, 51, 52, 53, 54, 56, 61, 62, 63, 64, 65, 67, 71, 72, 73, 74, 75, 76, 78, 81, 82, 83, 84, 85, 86, 87, 89, 91, 92, 93, 94, 95, 96, 97, 98, 99, 101, 110, 111, 112, 121, 122, 123, 131, 132, 141, 142, 151, 152, 161, 162, 171]

cp's OEIS Frontend

A116700 "Early bird" numbers: write the natural numbers in a string 12345678910111213.... Sequence gives numbers that occur in the string ahead of their natural place, sorted into increasing order (cf. A117804).

Table of values

List of values

n	a(n)
1	12
2	21
3	23
4	31
5	32
6	34
7	41
8	42
9	43
10	45
11	51
12	52
13	53
14	54
15	56
16	61
17	62
18	63
19	64
20	65
21	67
22	71
23	72
24	73
25	74
26	75
27	76
28	78
29	81
30	82
31	83
32	84
33	85
34	86
35	87
36	89
37	91
38	92
39	93
40	94
41	95
42	96
43	97
44	98
45	99
46	101
47	110
48	111
49	112
50	121
51	122
52	123
53	131
54	132
55	141
56	142
57	151
58	152
59	161
60	162
61	171

n	a(n)
1	12
2	21
3	23
4	31
5	32
6	34
7	41
8	42
9	43
10	45
11	51
12	52
13	53
14	54
15	56
16	61
17	62
18	63
19	64
20	65
21	67
22	71
23	72
24	73
25	74
26	75
27	76
28	78
29	81
30	82
31	83
32	84
33	85
34	86
35	87
36	89
37	91
38	92
39	93
40	94
41	95
42	96
43	97
44	98
45	99
46	101
47	110
48	111
49	112
50	121
51	122
52	123
53	131
54	132
55	141
56	142
57	151
58	152
59	161
60	162
61	171

n	a(n)
1	12
2	21
3	23
4	31
5	32
6	34
7	41
8	42
9	43
10	45
11	51
12	52
13	53
14	54
15	56
16	61
17	62
18	63
19	64
20	65
21	67
22	71
23	72
24	73
25	74
26	75
27	76
28	78
29	81
30	82
31	83
32	84
33	85
34	86
35	87
36	89
37	91
38	92
39	93
40	94
41	95
42	96
43	97
44	98
45	99
46	101
47	110
48	111
49	112
50	121
51	122
52	123
53	131
54	132
55	141
56	142
57	151
58	152
59	161
60	162
61	171