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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 36 |
| 3 | 2700 |
| 4 | 643680 |
| 5 | 190188000 |
| 6 | 128247235200 |
| 7 | 114921318153600 |
| 8 | 164433011758848000 |
| 9 | 312067875406065408000 |
| 10 | 867549791919350615040000 |
| 11 | 2986581009309337422259200000 |
[1,36,2700,643680,190188000,128247235200, 114921318153600,164433011758848000, 312067875406065408000,867549791919350615040000, 2986581009309337422259200000] |