A039402 - OEIS

A039402 as a simple table

n	a(n)
1	12
2	21
3	102
4	120
5	123
6	124
7	125
8	126
9	127
10	128
11	129
12	132
13	142
14	152
15	162
16	172
17	182
18	192
19	201
20	210
21	213
22	214
23	215
24	216
25	217
26	218
27	219
28	231
29	241
30	251
31	261
32	271
33	281
34	291
35	312
36	321
37	412
38	421
39	512
40	521
41	612
42	621
43	712
44	721
45	812
46	821
47	912
48	921
49	1002
50	1020

[12,21,102,120,123,124,125,126,127,128,129,132, 142,152,162,172,182,192,201,210,213,214,215,216, 217,218,219,231,241,251,261,271,281,291,312,321, 412,421,512,521,612,621,712,721,812,821,912,921, 1002,1020]