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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 100 |
| 3 | 990 |
| 4 | 9640 |
| 5 | 91900 |
| 6 | 855100 |
| 7 | 7754050 |
| 8 | 68545360 |
| 9 | 592095160 |
| 10 | 5020469200 |
| 11 | 42054532750 |
| 12 | 350538754600 |
| 13 | 2926602465940 |
| 14 | 24587635740040 |
| 15 | 208406304739450 |
| 16 | 1784567064858400 |
| 17 | 15453880256710000 |
| 18 | 135459380264937760 |
| 19 | 1202295227210127910 |
| 20 | 10804306958861721400 |
[1,10,100,990,9640,91900,855100,7754050,68545360, 592095160,5020469200,42054532750,350538754600, 2926602465940,24587635740040,208406304739450, 1784567064858400,15453880256710000, 135459380264937760,1202295227210127910, 10804306958861721400] |