n | a(n) |
---|---|
1 | 1 |
2 | 91 |
3 | 991 |
4 | 9991 |
5 | 99991 |
6 | 999991 |
7 | 9999991 |
8 | 99999991 |
9 | 999999991 |
10 | 9999999991 |
11 | 99999999991 |
12 | 999999999991 |
13 | 9999999999991 |
14 | 99999999999991 |
15 | 999999999999991 |
16 | 9999999999999991 |
17 | 99999999999999991 |
18 | 999999999999999991 |
19 | 9999999999999999991 |
20 | 99999999999999999991 |
21 | 999999999999999999991 |
[1,91,991,9991,99991,999991,9999991,99999991, 999999991,9999999991,99999999991,999999999991, 9999999999991,99999999999991,999999999999991, 9999999999999991,99999999999999991, 999999999999999991,9999999999999999991, 99999999999999999991,999999999999999999991] |