A076747 - OEIS

A076747 as a simple table

n	a(n)
1	3
2	13
3	13
4	23
5	43
6	53
7	73
8	83
9	103
10	113
11	163
12	173
13	223
14	233
15	283
16	293
17	373
18	383
19	433
20	443
21	643
22	653
23	673
24	683
25	733
26	743
27	853
28	863
29	1093
30	1103
31	1153
32	1163
33	1213
34	1223
35	1423
36	1433
37	1483
38	1493
39	1543
40	1553
41	1723
42	1733
43	1993
44	2003
45	2053
46	2063
47	2143
48	2153

[3,13,13,23,43,53,73,83,103,113,163,173,223,233, 283,293,373,383,433,443,643,653,673,683,733,743, 853,863,1093,1103,1153,1163,1213,1223,1423,1433, 1483,1493,1543,1553,1723,1733,1993,2003,2053,2063, 2143,2153]