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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 24 |
| 3 | 3432 |
| 4 | 487344 |
| 5 | 69199440 |
| 6 | 9825833160 |
| 7 | 1395199109304 |
| 8 | 198108447688032 |
| 9 | 28130004372591264 |
| 10 | 3994262512460271480 |
| 11 | 567157146764985958920 |
| 12 | 80532320578115545895184 |
| 13 | 11435022364945642531157232 |
| 14 | 1623692643501703123878431784 |
| 15 | 230552920354876897948206156120 |
[0,24,3432,487344,69199440,9825833160, 1395199109304,198108447688032,28130004372591264, 3994262512460271480,567157146764985958920, 80532320578115545895184, 11435022364945642531157232, 1623692643501703123878431784, 230552920354876897948206156120] |