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| n | a(n) |
|---|---|
| 1 | 45 |
| 2 | 540 |
| 3 | 50040 |
| 4 | 3364890 |
| 5 | 334795890 |
| 6 | 27671338200 |
| 7 | 2761284321300 |
| 8 | 241066406350560 |
| 9 | 24071550717893160 |
| 10 | 2164109364980520560 |
| 11 | 216167870783354294560 |
| 12 | 19804111510101766391920 |
| 13 | 1978598460245429017365520 |
| 14 | 183672136030518949796846320 |
[45,540,50040,3364890,334795890,27671338200, 2761284321300,241066406350560,24071550717893160, 2164109364980520560,216167870783354294560, 19804111510101766391920,1978598460245429017365520, 183672136030518949796846320] |