n | a(n) |
---|---|
1 | 0 |
2 | 81 |
3 | 9729 |
4 | 996399 |
5 | 99954999 |
6 | 99630099630 |
7 | 999993699999 |
8 | 99999927999999 |
9 | 99999991899999991 |
10 | 9999999990999999999 |
11 | 999999999009999999990 |
12 | 99999999900099999999900 |
13 | 9999999990000999999999000 |
14 | 999999999000009999999990000 |
15 | 99999999999630099999999999630 |
[0,81,9729,996399,99954999,99630099630, 999993699999,99999927999999,99999991899999991, 9999999990999999999,999999999009999999990, 99999999900099999999900,9999999990000999999999000, 999999999000009999999990000, 99999999999630099999999999630] |