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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 8 |
| 3 | 216 |
| 4 | 1728 |
| 5 | 216000 |
| 6 | 216000 |
| 7 | 74088000 |
| 8 | 592704000 |
| 9 | 16003008000 |
| 10 | 16003008000 |
| 11 | 21300003648000 |
| 12 | 21300003648000 |
| 13 | 46796108014656000 |
| 14 | 46796108014656000 |
| 15 | 46796108014656000 |
| 16 | 374368864117248000 |
| 17 | 1839274229408039424000 |
| 18 | 1839274229408039424000 |
[1,8,216,1728,216000,216000,74088000,592704000, 16003008000,16003008000,21300003648000, 21300003648000,46796108014656000, 46796108014656000,46796108014656000, 374368864117248000,1839274229408039424000, 1839274229408039424000] |