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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 190 |
| 3 | 4060 |
| 4 | 91390 |
| 5 | 2118760 |
| 6 | 50063860 |
| 7 | 1198774720 |
| 8 | 28987537150 |
| 9 | 706252528630 |
| 10 | 17310309456440 |
| 11 | 426342151127100 |
| 12 | 10542859559688820 |
| 13 | 261594860525768000 |
| 14 | 6509613950241656640 |
| 15 | 162392216278033616560 |
| 16 | 4059949873964357469950 |
| 17 | 101696990867999141755140 |
[1,10,190,4060,91390,2118760,50063860,1198774720, 28987537150,706252528630,17310309456440, 426342151127100,10542859559688820, 261594860525768000,6509613950241656640, 162392216278033616560,4059949873964357469950, 101696990867999141755140] |