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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 16 |
| 3 | 1053 |
| 4 | 111616 |
| 5 | 19188125 |
| 6 | 4782986496 |
| 7 | 1636365422153 |
| 8 | 735546407124992 |
| 9 | 420472391422517289 |
| 10 | 297915693945728000000 |
| 11 | 256254423319439013201029 |
| 12 | 263056604016582698937090048 |
| 13 | 317691429498449659489885141925 |
[1,16,1053,111616,19188125,4782986496, 1636365422153,735546407124992,420472391422517289, 297915693945728000000,256254423319439013201029, 263056604016582698937090048, 317691429498449659489885141925] |