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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 10 |
| 3 | 73 |
| 4 | 574 |
| 5 | 4543 |
| 6 | 37723 |
| 7 | 320991 |
| 8 | 2796946 |
| 9 | 24758534 |
| 10 | 222126290 |
| 11 | 2014200162 |
| 12 | 18425778658 |
[0,10,73,574,4543,37723,320991,2796946,24758534, 222126290,2014200162,18425778658] |