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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 105 |
| 2 | 38808 |
| 3 | 18595500 |
| 4 | 10000998000 |
| 5 | 5742915942960 |
| 6 | 3440119256028000 |
| 7 | 2122455291847675200 |
| 8 | 1338358017590361495000 |
| 9 | 858192528139829777895000 |
| 10 | 557657055926757140695941600 |
| 11 | 366299456771890110076863664500 |
| 12 | 242765837117133913048941576656100 |
| 13 | 162109136966873437562041203714292500 |
[1,105,38808,18595500,10000998000,5742915942960, 3440119256028000,2122455291847675200, 1338358017590361495000,858192528139829777895000, 557657055926757140695941600, 366299456771890110076863664500, 242765837117133913048941576656100, 162109136966873437562041203714292500] |