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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 192 |
| 2 | 3732480 |
| 3 | 105815808000000 |
| 4 | 15845956399848960000000000 |
| 5 | 64521196676588557133336908800000000000000 |
| 6 | 11596208520592232147315615803672416545196288000000000000000000 |
| 7 | 254410805372253907145905144265082090216385314644252349615132618240000000000000000000000 |
[2,192,3732480,105815808000000, 15845956399848960000000000, 64521196676588557133336908800000000000000, 11596208520592232147315615803672416545196288000000\ 000000000000, 25441080537225390714590514426508209021638531464425\ 2349615132618240000000000000000000000] |