A085186 - OEIS

A085186 as a simple table

n	a(n)
0	0
1	1
2	10
3	11
4	13
5	100
6	101
7	110
8	111
9	113
10	130
11	131
12	133
13	203
14	1000
15	1001
16	1010
17	1011
18	1013
19	1100
20	1101
21	1110
22	1111
23	1113
24	1130
25	1131
26	1133
27	1203
28	1300
29	1301
30	1310
31	1311
32	1313
33	1330
34	1331
35	1333
36	2003
37	2030
38	2031
39	2033
40	2103
41	2123
42	10000
43	10001
44	10010

[0,1,10,11,13,100,101,110,111,113,130,131,133,203, 1000,1001,1010,1011,1013,1100,1101,1110,1111,1113, 1130,1131,1133,1203,1300,1301,1310,1311,1313,1330, 1331,1333,2003,2030,2031,2033,2103,2123,10000, 10001,10010]