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| n | a(n) |
|---|---|
| 1 | 90 |
| 2 | 67950 |
| 3 | 90291600 |
| 4 | 154700988750 |
| 5 | 306407299538340 |
| 6 | 666569141498660400 |
| 7 | 1548539246648239560000 |
| 8 | 3776577900841430197548750 |
| 9 | 9561215418596022668009737500 |
| 10 | 24935177268489106332174087326700 |
[90,67950,90291600,154700988750,306407299538340, 666569141498660400,1548539246648239560000, 3776577900841430197548750, 9561215418596022668009737500, 24935177268489106332174087326700] |