n | a(n) |
---|---|
1 | 9 |
2 | 990 |
3 | 99900 |
4 | 9999000 |
5 | 999990000 |
6 | 99999900000 |
7 | 9999999000000 |
8 | 999999990000000 |
9 | 99999999900000000 |
10 | 9999999999000000000 |
11 | 999999999990000000000 |
12 | 99999999999900000000000 |
13 | 9999999999999000000000000 |
14 | 999999999999990000000000000 |
15 | 99999999999999900000000000000 |
[9,990,99900,9999000,999990000,99999900000, 9999999000000,999999990000000,99999999900000000, 9999999999000000000,999999999990000000000, 99999999999900000000000,9999999999999000000000000, 999999999999990000000000000, 99999999999999900000000000000] |