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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 22 |
| 3 | 11380 |
| 4 | 991365512 |
| 5 | 25162900228200976 |
| 6 | 284854886025567226297639952 |
| 7 | 2093990992170633308203972573924209991024 |
| 8 | 13828588617717374636071022960227309614538766239157199488 |
| 9 | 108581118792865622142187514289639080469248439675462122946671780723171080576 |
[1,1,22,11380,991365512,25162900228200976, 284854886025567226297639952, 2093990992170633308203972573924209991024, 13828588617717374636071022960227309614538766239157\ 199488, 10858111879286562214218751428963908046924843967546\ 2122946671780723171080576] |