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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 3 |
| 2 | -7 |
| 3 | 497 |
| 4 | 10649 |
| 5 | 955757 |
| 6 | 167741741 |
| 7 | 20817188849 |
| 8 | 5637483533393 |
| 9 | 1653225944489237 |
| 10 | 560689820639903957 |
| 11 | 269465649695982142009 |
| 12 | 138258119776900090716601 |
| 13 | 87774869737967098700912797 |
| 14 | 65239835100565334768577561149 |
| 15 | 54460490625029012562328972397057 |
[0,3,-7,497,10649,955757,167741741,20817188849, 5637483533393,1653225944489237,560689820639903957, 269465649695982142009,138258119776900090716601, 87774869737967098700912797, 65239835100565334768577561149, 54460490625029012562328972397057] |