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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 51 |
| 4 | 1059 |
| 5 | 44620 |
| 6 | 3795202 |
| 7 | 649054326 |
| 8 | 222639357434 |
| 9 | 152968659433948 |
| 10 | 210361428050679489 |
| 11 | 578800452225641673965 |
| 12 | 3185715127946958245708501 |
| 13 | 35071788327149162320178667272 |
| 14 | 772254422082165524711277630023576 |
[1,1,5,51,1059,44620,3795202,649054326, 222639357434,152968659433948,210361428050679489, 578800452225641673965,3185715127946958245708501, 35071788327149162320178667272, 772254422082165524711277630023576] |