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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 40864828320 |
| 5 | 7792009289281728000 |
| 6 | 187746872107299580970294400000 |
| 7 | 614005731326101652800803825889630961295360 |
| 8 | 176445174659483893854948844253232539237396497554309120000 |
| 9 | 7090469783239448892319287907564531885316857076509137838529329991091840000 |
[1,1,1,1,40864828320,7792009289281728000, 187746872107299580970294400000, 614005731326101652800803825889630961295360, 17644517465948389385494884425323253923739649755430\ 9120000, 70904697832394488923192879075645318853168570765091\ 37838529329991091840000] |