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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 6 |
| 4 | 104 |
| 5 | 4736 |
| 6 | 770112 |
| 7 | 440994608 |
| 8 | 896679244544 |
| 9 | 6513978322585408 |
| 10 | 170630215971902124288 |
| 11 | 16261454692523251085611648 |
| 12 | 5683372715412699486531047331840 |
| 13 | 7334542846356464931239079919515090432 |
| 14 | 35157828307617499760690834338506768579289088 |
[0,1,6,104,4736,770112,440994608,896679244544, 6513978322585408,170630215971902124288, 16261454692523251085611648, 5683372715412699486531047331840, 7334542846356464931239079919515090432, 35157828307617499760690834338506768579289088] |