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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 8 |
| 3 | 109 |
| 4 | 2229 |
| 5 | 62684 |
| 6 | 2289151 |
| 7 | 104344153 |
| 8 | 5767234550 |
| 9 | 378073098155 |
| 10 | 28888082263581 |
| 11 | 2536660090249102 |
| 12 | 253007765488793325 |
| 13 | 28383529110762969901 |
| 14 | 3551558435250676339536 |
| 15 | 492092920443604792460905 |
| 16 | 75025155137863150912784409 |
| 17 | 12516480979952118669729618300 |
[1,1,8,109,2229,62684,2289151,104344153, 5767234550,378073098155,28888082263581, 2536660090249102,253007765488793325, 28383529110762969901,3551558435250676339536, 492092920443604792460905, 75025155137863150912784409, 12516480979952118669729618300] |