A107598 - OEIS

A107598 as a simple table

n	a(n)
0	0
1	1
2	11
3	3
4	22
5	5
6	33
7	7
8	44
9	9
10	100
11	11
12	111
13	13
14	122
15	15
16	133
17	17
18	144
19	19
20	1100
21	111
22	1111
23	113
24	1122
25	115
26	1133
27	117
28	1144
29	119
30	300
31	31
32	311
33	33
34	322
35	35
36	333
37	37
38	344
39	39
40	2200
41	221
42	2211
43	223
44	2222
45	225
46	2233
47	227
48	2244
49	229
50	500

[0,1,11,3,22,5,33,7,44,9,100,11,111,13,122,15,133, 17,144,19,1100,111,1111,113,1122,115,1133,117, 1144,119,300,31,311,33,322,35,333,37,344,39,2200, 221,2211,223,2222,225,2233,227,2244,229,500]