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| n | a(n) |
|---|---|
| 1 | 64 |
| 2 | 3900 |
| 3 | 224720 |
| 4 | 11130176 |
| 5 | 533254872 |
| 6 | 25205141664 |
| 7 | 1186378174632 |
| 8 | 55757344229608 |
| 9 | 2619135139987152 |
| 10 | 123008527782636280 |
| 11 | 5776771898928159264 |
| 12 | 271284921060940783616 |
| 13 | 12739804163679631293480 |
| 14 | 598272007349013201194072 |
[64,3900,224720,11130176,533254872,25205141664, 1186378174632,55757344229608,2619135139987152, 123008527782636280,5776771898928159264, 271284921060940783616,12739804163679631293480, 598272007349013201194072] |