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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1430 |
| 3 | 23371634 |
| 4 | 1489877926680 |
| 5 | 231471904322784840 |
| 6 | 67867669180627125604080 |
| 7 | 32103104214166146088869942000 |
| 8 | 22081374992701950398847674830857600 |
| 9 | 20535535214275361308250745082811167425600 |
| 10 | 24486819823897171791550434989846505231774984000 |
[1,1,1430,23371634,1489877926680, 231471904322784840,67867669180627125604080, 32103104214166146088869942000, 22081374992701950398847674830857600, 20535535214275361308250745082811167425600, 24486819823897171791550434989846505231774984000] |