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| n | a(n) |
|---|---|
| 10 | 1 |
| 11 | 110 |
| 12 | 7326 |
| 13 | 386100 |
| 14 | 17846829 |
| 15 | 762431670 |
| 16 | 31039608600 |
| 17 | 1227833727120 |
| 18 | 47809764352350 |
| 19 | 1849155516788580 |
| 20 | 71501760198168300 |
| 21 | 2777115998421765000 |
| 22 | 108722966424618095550 |
| 23 | 4301625967084096150500 |
| 24 | 172338358130509601230200 |
[1,110,7326,386100,17846829,762431670,31039608600, 1227833727120,47809764352350,1849155516788580, 71501760198168300,2777115998421765000, 108722966424618095550,4301625967084096150500, 172338358130509601230200] |