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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5040 |
| 2 | 135135 |
| 3 | 210455470 |
| 4 | 1428739165560 |
| 5 | 23060727168393236 |
| 6 | 668821362774214965294 |
| 7 | 29745278219128813035415595 |
| 8 | 1835364055105945091130559202709 |
| 9 | 146812609193179942830629976945746464 |
| 10 | 14506158303190746913523011613729321067580 |
[1,5040,135135,210455470,1428739165560, 23060727168393236,668821362774214965294, 29745278219128813035415595, 1835364055105945091130559202709, 146812609193179942830629976945746464, 14506158303190746913523011613729321067580] |