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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 20 |
| 3 | 436 |
| 4 | 20328 |
| 5 | 2031458 |
| 6 | 437195902 |
| 7 | 203480382352 |
| 8 | 205483944581920 |
| 9 | 451366246767611480 |
| 10 | 2160705231357646411125 |
| 11 | 22573295655756312398175000 |
| 12 | 515221804925867786482305225000 |
| 13 | 25712664286501013077919242976580000 |
| 14 | 2807516217865237733692455994521326628000 |
[2,20,436,20328,2031458,437195902,203480382352, 205483944581920,451366246767611480, 2160705231357646411125,22573295655756312398175000, 515221804925867786482305225000, 25712664286501013077919242976580000, 2807516217865237733692455994521326628000] |