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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 4352 |
| 3 | 807003 |
| 4 | 33685504 |
| 5 | 611328125 |
| 6 | 6535385856 |
| 7 | 48464682007 |
| 8 | 274945015808 |
| 9 | 1271126624409 |
| 10 | 5000500000000 |
| 11 | 17262535045811 |
| 12 | 53499182579712 |
| 13 | 151442855545813 |
| 14 | 396867717150464 |
| 15 | 973116755859375 |
| 16 | 2251834173423616 |
| 17 | 4952348310391217 |
| 18 | 10411581612480768 |
[0,1,4352,807003,33685504,611328125,6535385856, 48464682007,274945015808,1271126624409, 5000500000000,17262535045811,53499182579712, 151442855545813,396867717150464,973116755859375, 2251834173423616,4952348310391217, 10411581612480768] |