A077726 - OEIS

A077726 as a simple table

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	109
11	119
12	129
13	139
14	149
15	159
16	169
17	179
18	189
19	199
20	2099
21	2199
22	2299
23	2399
24	2499
25	2599
26	2699
27	2799
28	2899
29	2999
30	30999
31	31999
32	32999
33	33999
34	34999
35	35999
36	36999
37	37999
38	38999
39	39999
40	409999
41	419999
42	429999
43	439999
44	449999

[1,2,3,4,5,6,7,8,9,109,119,129,139,149,159,169, 179,189,199,2099,2199,2299,2399,2499,2599,2699, 2799,2899,2999,30999,31999,32999,33999,34999, 35999,36999,37999,38999,39999,409999,419999, 429999,439999,449999]