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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 62 |
| 3 | 1806 |
| 4 | 40824 |
| 5 | 834120 |
| 6 | 16435440 |
| 7 | 322494480 |
| 8 | 6411968640 |
| 9 | 130456085760 |
| 10 | 2731586457600 |
| 11 | 59056027430400 |
| 12 | 1320663933388800 |
| 13 | 30575780537702400 |
| 14 | 733062897120153600 |
| 15 | 18198613875746304000 |
[0,1,62,1806,40824,834120,16435440,322494480, 6411968640,130456085760,2731586457600, 59056027430400,1320663933388800,30575780537702400, 733062897120153600,18198613875746304000] |