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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 325 |
| 3 | 2917 |
| 4 | 247861 |
| 5 | 5937301 |
| 6 | 265793401 |
| 7 | 10705726585 |
| 8 | 378746444917 |
| 9 | 18588932910901 |
| 10 | 657940881863305 |
| 11 | 32580334626782185 |
| 12 | 1257522211980656425 |
| 13 | 59212895251349313865 |
| 14 | 2490039488311462939645 |
| 15 | 112553667120196462181437 |
[1,1,325,2917,247861,5937301,265793401, 10705726585,378746444917,18588932910901, 657940881863305,32580334626782185, 1257522211980656425,59212895251349313865, 2490039488311462939645,112553667120196462181437] |