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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 240 |
| 3 | 3600 |
| 4 | 53200 |
| 5 | 786000 |
| 6 | 11543952 |
| 7 | 169538256 |
| 8 | 2482215952 |
| 9 | 36341716432 |
| 10 | 531081176880 |
| 11 | 7760918381072 |
[16,240,3600,53200,786000,11543952,169538256, 2482215952,36341716432,531081176880,7760918381072] |