n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 7 |
4 | 9 |
5 | 37 |
6 | 49 |
7 | 99 |
8 | 379 |
9 | 399 |
10 | 787 |
11 | 799 |
12 | 1989 |
13 | 1999 |
14 | 3999 |
15 | 6997 |
16 | 17899 |
17 | 18999 |
18 | 38989 |
19 | 67999 |
20 | 79899 |
21 | 79999 |
22 | 389899 |
23 | 499989 |
24 | 798979 |
25 | 897999 |
26 | 989899 |
27 | 2999997 |
28 | 2899999 |
29 | 4998999 |
[1,3,7,9,37,49,99,379,399,787,799,1989,1999,3999, 6997,17899,18999,38989,67999,79899,79999,389899, 499989,798979,897999,989899,2999997,2899999, 4998999] |