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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 104 |
| 3 | 1120 |
| 4 | 12416 |
| 5 | 140800 |
| 6 | 1624064 |
| 7 | 18964480 |
| 8 | 223379456 |
| 9 | 2646999040 |
| 10 | 31495553024 |
| 11 | 375799152640 |
| 12 | 4492409962496 |
| 13 | 53771480596480 |
| 14 | 644158255529984 |
| 15 | 7721102973337600 |
| 16 | 92582866935873536 |
| 17 | 1110431453277061120 |
| 18 | 13320673839697362944 |
| 19 | 159812057279349391360 |
[1,10,104,1120,12416,140800,1624064,18964480, 223379456,2646999040,31495553024,375799152640, 4492409962496,53771480596480,644158255529984, 7721102973337600,92582866935873536, 1110431453277061120,13320673839697362944, 159812057279349391360] |