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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 154 |
| 3 | 1546 |
| 4 | 183088 |
| 5 | 6832578 |
| 6 | 485186602 |
| 7 | 25669880656 |
| 8 | 1576356652138 |
| 9 | 90342705475634 |
| 10 | 5358270247598784 |
| 11 | 312733245050099786 |
[0,154,1546,183088,6832578,485186602,25669880656, 1576356652138,90342705475634,5358270247598784, 312733245050099786] |