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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 104 |
| 3 | 2440 |
| 4 | 60497 |
| 5 | 3570731 |
| 6 | 160441457 |
| 7 | 7844725524 |
| 8 | 380985444657 |
| 9 | 18510417612668 |
| 10 | 902275957883352 |
| 11 | 43936865148320525 |
| 12 | 2140933146128529606 |
| 13 | 104313951368150470461 |
| 14 | 5082784700709399173199 |
| 15 | 247666770498486555848961 |
[0,104,2440,60497,3570731,160441457,7844725524, 380985444657,18510417612668,902275957883352, 43936865148320525,2140933146128529606, 104313951368150470461,5082784700709399173199, 247666770498486555848961] |