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| n | a(n) |
|---|---|
| 1 | 1264 |
| 2 | 9376 |
| 3 | 65280 |
| 4 | 496200 |
| 5 | 3580624 |
| 6 | 27131156 |
| 7 | 197246776 |
| 8 | 1489635452 |
| 9 | 10865513648 |
| 10 | 81862032376 |
| 11 | 598379968648 |
| 12 | 4500240416436 |
| 13 | 32947358044272 |
| 14 | 247440445604280 |
| 15 | 1813879830869864 |
| 16 | 13606842940349600 |
| 17 | 99852380084946000 |
[1264,9376,65280,496200,3580624,27131156, 197246776,1489635452,10865513648,81862032376, 598379968648,4500240416436,32947358044272, 247440445604280,1813879830869864, 13606842940349600,99852380084946000] |