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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 256 |
| 3 | 2500 |
| 4 | 23716 |
| 5 | 207936 |
| 6 | 1806336 |
| 7 | 15523600 |
| 8 | 133079296 |
| 9 | 1138927504 |
| 10 | 9743269264 |
| 11 | 83333832976 |
| 12 | 712693900944 |
| 13 | 6094953689616 |
| 14 | 52123490515600 |
| 15 | 445753532991376 |
| 16 | 3812020725166096 |
| 17 | 32599837915279504 |
| 18 | 278788946325939856 |
[16,256,2500,23716,207936,1806336,15523600, 133079296,1138927504,9743269264,83333832976, 712693900944,6094953689616,52123490515600, 445753532991376,3812020725166096, 32599837915279504,278788946325939856] |