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| n | a(n) |
|---|---|
| 1 | 45 |
| 2 | 60 |
| 3 | 54600 |
| 4 | 257040 |
| 5 | 1801800 |
| 6 | 2789640 |
| 7 | 4299750 |
| 8 | 47297250 |
| 9 | 1707259680 |
| 10 | 4093362000 |
[45,60,54600,257040,1801800,2789640,4299750, 47297250,1707259680,4093362000] |