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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 9 |
| 4 | 96 |
| 5 | 1250 |
| 6 | 19440 |
| 7 | 352947 |
| 8 | 7340032 |
| 9 | 172186884 |
| 10 | 4500000000 |
| 11 | 129687123005 |
| 12 | 4086546038784 |
| 13 | 139788510734886 |
| 14 | 5159146026151936 |
| 15 | 204350482177734375 |
| 16 | 8646911284551352320 |
| 17 | 389289535005334947848 |
| 18 | 18580248257778920521728 |
[0,0,1,9,96,1250,19440,352947,7340032,172186884, 4500000000,129687123005,4086546038784, 139788510734886,5159146026151936, 204350482177734375,8646911284551352320, 389289535005334947848,18580248257778920521728] |