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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 512 |
| 2 | 10077696 |
| 3 | 859963392 |
| 4 | 2519424000000000 |
| 5 | 335923200000000 |
| 6 | 20333569192473600000000 |
| 7 | 24787589110824960000000 |
| 8 | 1016446075975766016000000000 |
| 9 | 6453625879211212800000000 |
| 10 | 79890889262435601646115635200000000 |
| 11 | 184452269581380898461450240000000 |
[1,512,10077696,859963392,2519424000000000, 335923200000000,20333569192473600000000, 24787589110824960000000, 1016446075975766016000000000, 6453625879211212800000000, 79890889262435601646115635200000000, 184452269581380898461450240000000] |