A165551 - OEIS

A165551 as a simple table

n	a(n)
0	0
1	1
2	2
3	10
4	20
5	31
6	100
7	103
8	123
9	200
10	203
11	301
12	302
13	310
14	1000
15	1003
16	1030
17	1230
18	1302
19	1312
20	1321
21	2000
22	2003
23	2030
24	2312
25	3001
26	3002
27	3010
28	3020
29	3032
30	3100
31	3112
32	3211
33	3213
34	3221
35	10000
36	10003
37	10030
38	10033
39	10232
40	10300
41	10303
42	11223
43	12033

[0,1,2,10,20,31,100,103,123,200,203,301,302,310, 1000,1003,1030,1230,1302,1312,1321,2000,2003,2030, 2312,3001,3002,3010,3020,3032,3100,3112,3211,3213, 3221,10000,10003,10030,10033,10232,10300,10303, 11223,12033]