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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 16 |
| 3 | 304 |
| 4 | 10496 |
| 5 | 568832 |
| 6 | 44486656 |
| 7 | 4742354944 |
| 8 | 660908343296 |
| 9 | 116642430451712 |
| 10 | 25425572550148096 |
| 11 | 6708171660023824384 |
| 12 | 2106760489114215120896 |
| 13 | 776654121137653931835392 |
| 14 | 332101031506139993274843136 |
| 15 | 163037618505293422657351450624 |
| 16 | 91075662529714266445615040823296 |
[1,2,16,304,10496,568832,44486656,4742354944, 660908343296,116642430451712,25425572550148096, 6708171660023824384,2106760489114215120896, 776654121137653931835392, 332101031506139993274843136, 163037618505293422657351450624, 91075662529714266445615040823296] |