A044377 - OEIS

A044377 as a simple table

n	a(n)
1	45
2	145
3	245
4	345
5	445
6	450
7	545
8	645
9	745
10	845
11	945
12	1045
13	1145
14	1245
15	1345
16	1445
17	1450
18	1545
19	1645
20	1745
21	1845
22	1945
23	2045
24	2145
25	2245
26	2345
27	2445
28	2450
29	2545
30	2645
31	2745
32	2845
33	2945
34	3045
35	3145
36	3245
37	3345
38	3445
39	3450

[45,145,245,345,445,450,545,645,745,845,945,1045, 1145,1245,1345,1445,1450,1545,1645,1745,1845,1945, 2045,2145,2245,2345,2445,2450,2545,2645,2745,2845, 2945,3045,3145,3245,3345,3445,3450]