A038786 - OEIS

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A038786 as a simple table

n	a(n)
1	4
2	216
3	399480
4	10481104587335216
5	123992391755402970675056
6	81988033818127290961563099285346969402464
7	4480981113642949878240780781141254929604041319907336

[4,216,399480,10481104587335216, 123992391755402970675056, 81988033818127290961563099285346969402464, 44809811136429498782407807811412549296040413199073\ 36]