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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 4 |
| 2 | 64 |
| 3 | 1296 |
| 4 | 32768 |
| 5 | 1000000 |
| 6 | 35831808 |
| 7 | 1475789056 |
| 8 | 68719476736 |
| 9 | 3570467226624 |
| 10 | 204800000000000 |
| 11 | 12855002631049216 |
| 12 | 876488338465357824 |
| 13 | 64509974703297150976 |
| 14 | 5097655355238390956032 |
| 15 | 430467210000000000000000 |
| 16 | 38685626227668133590597632 |
[0,4,64,1296,32768,1000000,35831808,1475789056, 68719476736,3570467226624,204800000000000, 12855002631049216,876488338465357824, 64509974703297150976,5097655355238390956032, 430467210000000000000000, 38685626227668133590597632] |