A044756 - OEIS

A044756 as a simple table

n	a(n)
1	43
2	143
3	243
4	343
5	439
6	443
7	543
8	643
9	743
10	843
11	943
12	1043
13	1143
14	1243
15	1343
16	1439
17	1443
18	1543
19	1643
20	1743
21	1843
22	1943
23	2043
24	2143
25	2243
26	2343
27	2439
28	2443
29	2543
30	2643
31	2743
32	2843
33	2943
34	3043
35	3143
36	3243
37	3343
38	3439
39	3443

[43,143,243,343,439,443,543,643,743,843,943,1043, 1143,1243,1343,1439,1443,1543,1643,1743,1843,1943, 2043,2143,2243,2343,2439,2443,2543,2643,2743,2843, 2943,3043,3143,3243,3343,3439,3443]