A361831 - OEIS

A361831 as a simple table

n	a(n)
2	2
3	3
4	13
5	5
6	6
7	7
8	17
9	9
10	19
11	29
12	39
13	67
14	59
15	69
16	79
17	89
18	99
19	199
20	389
21	489
22	499
23	599
24	699
25	997
26	1889
27	999
28	1999
29	2999
30	4989
31	4999
32	6899
33	6999
34	17989
35	8999
36	18999
37	29989
38	39989
39	48999
40	49999
41	59999
42	69999
43	79999
44	98999
45	198999
46	199999
47	389999
48	589989
49	598999
50	599999
51	798999
52	799999
53	989999

[2,3,13,5,6,7,17,9,19,29,39,67,59,69,79,89,99,199, 389,489,499,599,699,997,1889,999,1999,2999,4989, 4999,6899,6999,17989,8999,18999,29989,39989,48999, 49999,59999,69999,79999,98999,198999,199999, 389999,589989,598999,599999,798999,799999,989999]