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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 8 |
| 3 | 324 |
| 4 | 35840 |
| 5 | 7906250 |
| 6 | 2931489792 |
| 7 | 1645181968584 |
| 8 | 1302784779485184 |
| 9 | 1384565648740109550 |
| 10 | 1902231808400000000000 |
| 11 | 3281726715984295577534536 |
| 12 | 6946466406905591840863420416 |
| 13 | 17702487251379919853870809258728 |
| 14 | 53467000591059566447137539120168960 |
[1,1,8,324,35840,7906250,2931489792,1645181968584, 1302784779485184,1384565648740109550, 1902231808400000000000,3281726715984295577534536, 6946466406905591840863420416, 17702487251379919853870809258728, 53467000591059566447137539120168960] |