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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 2 |
| 2 | 58 |
| 3 | 3250 |
| 4 | 292498 |
| 5 | 38609738 |
| 6 | 7026972314 |
| 7 | 1686473355362 |
| 8 | 516060846740770 |
| 9 | 196103121761492602 |
| 10 | 90599642253809582122 |
| 11 | 50011002524102889331346 |
| 12 | 32507151640666878065374898 |
| 13 | 24575406640344159817423422890 |
[0,2,58,3250,292498,38609738,7026972314, 1686473355362,516060846740770,196103121761492602, 90599642253809582122,50011002524102889331346, 32507151640666878065374898, 24575406640344159817423422890] |