The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 90 |
| 3 | 810 |
| 4 | 7290 |
| 5 | 65565 |
| 6 | 589680 |
| 7 | 5303520 |
| 8 | 47699280 |
| 9 | 429001920 |
| 10 | 3858394860 |
| 11 | 34701968160 |
| 12 | 312105587040 |
| 13 | 2807042441760 |
| 14 | 25246223065440 |
| 15 | 227061682284240 |
| 16 | 2042167156174080 |
| 17 | 18367021030590720 |
| 18 | 165190915209012480 |
[1,10,90,810,7290,65565,589680,5303520,47699280, 429001920,3858394860,34701968160,312105587040, 2807042441760,25246223065440,227061682284240, 2042167156174080,18367021030590720, 165190915209012480] |