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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 25456 |
| 3 | 4237316640 |
| 4 | 4641143801988096 |
| 5 | 21554673989105266329600 |
| 6 | 321725679938644429666942894080 |
| 7 | 12776780124456086724647909301669888000 |
| 8 | 1177656217569966231516887166301967113047244800 |
| 9 | 227208414798817556276324254464686576989326580855603200 |
| 10 | 84636938569466121967980317320556480770113134488834340290560000 |
[1,2,25456,4237316640,4641143801988096, 21554673989105266329600, 321725679938644429666942894080, 12776780124456086724647909301669888000, 1177656217569966231516887166301967113047244800, 22720841479881755627632425446468657698932658085560\ 3200, 84636938569466121967980317320556480770113134488834\ 340290560000] |