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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 8 |
| 2 | 1600 |
| 3 | 37179 |
| 4 | 352256 |
| 5 | 2031250 |
| 6 | 8538048 |
| 7 | 28824005 |
| 8 | 82837504 |
| 9 | 210450636 |
| 10 | 485000000 |
| 11 | 1032820063 |
| 12 | 2060328960 |
| 13 | 3890408054 |
| 14 | 7009998016 |
| 15 | 12131015625 |
| 16 | 20266876928 |
| 17 | 32827093840 |
| 18 | 51732592704 |
| 19 | 79554584771 |
| 20 | 119680000000 |
| 21 | 176506677018 |
| 22 | 255671683520 |
| 23 | 364316322829 |
[0,8,1600,37179,352256,2031250,8538048,28824005, 82837504,210450636,485000000,1032820063, 2060328960,3890408054,7009998016,12131015625, 20266876928,32827093840,51732592704,79554584771, 119680000000,176506677018,255671683520, 364316322829] |