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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 104 |
| 4 | 9792 |
| 5 | 4887552 |
| 6 | 10456694784 |
| 7 | 80831009783808 |
| 8 | 2695921347430711296 |
| 9 | 347083584759711311855616 |
| 10 | 184330749741189300682890412032 |
| 11 | 383205061911277693825526401937178624 |
| 12 | 3224343525101169010615339144085384529444864 |
| 13 | 107976295438859678148286176040509108456782680817664 |
[1,1,2,104,9792,4887552,10456694784, 80831009783808,2695921347430711296, 347083584759711311855616, 184330749741189300682890412032, 383205061911277693825526401937178624, 3224343525101169010615339144085384529444864, 10797629543885967814828617604050910845678268081766\ 4] |