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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 600 |
| 3 | 35562240 |
| 4 | 1434015830016000 |
| 5 | 70448433354492434841600000 |
| 6 | 6610702315560389323908439364075520000000 |
| 7 | 1709479709147705756603303596364188306401499545600000000000 |
| 8 | 1660017838341811463102474357555838707949172571314554168163386261504000000000000 |
[1,3,600,35562240,1434015830016000, 70448433354492434841600000, 6610702315560389323908439364075520000000, 17094797091477057566033035963641883064014995456000\ 00000000, 16600178383418114631024743575558387079491725713145\ 54168163386261504000000000000] |