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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 10 |
| 3 | 96 |
| 4 | 920 |
| 5 | 8816 |
| 6 | 84480 |
| 7 | 809536 |
| 8 | 7757440 |
| 9 | 74336256 |
| 10 | 712332800 |
| 11 | 6825982976 |
| 12 | 65410498560 |
| 13 | 626801053696 |
| 14 | 6006368542720 |
| 15 | 57556481212416 |
| 16 | 551539337953280 |
| 17 | 5285167454683136 |
| 18 | 50645517195018240 |
| 19 | 485314502131449856 |
| 20 | 4650562952534425600 |
| 21 | 44564371516818456576 |
[0,1,10,96,920,8816,84480,809536,7757440,74336256, 712332800,6825982976,65410498560,626801053696, 6006368542720,57556481212416,551539337953280, 5285167454683136,50645517195018240, 485314502131449856,4650562952534425600, 44564371516818456576] |