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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 4 |
| 4 | 62 |
| 5 | 3512 |
| 6 | 664808 |
| 7 | 434127872 |
| 8 | 1019647584176 |
| 9 | 8819902136975232 |
| 10 | 284798318582888943488 |
| 11 | 34636901578294133264379392 |
| 12 | 15970288165992077917879019856128 |
| 13 | 28060652850285225214988677642354678784 |
| 14 | 188680826646319054103468721801532841166681088 |
[1,1,4,62,3512,664808,434127872,1019647584176, 8819902136975232,284798318582888943488, 34636901578294133264379392, 15970288165992077917879019856128, 28060652850285225214988677642354678784, 188680826646319054103468721801532841166681088] |