| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 936 |
| 3 | 1825221320 |
| 4 | 70351928759681296000 |
| 5 | 160978956785364112335731878007698260 |
| 6 | 51488321677815455036453939239317069333712945710369620220 |
| 7 | 4648889159675386017282064494039528050991187044317172798976485350954735075040045120 |
[1,2,936,1825221320,70351928759681296000, 160978956785364112335731878007698260, 51488321677815455036453939239317069333712945710369\ 620220, 46488891596753860172820644940395280509911870443171\ 72798976485350954735075040045120] |