A166953 - OEIS

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A166953 as a simple table

n	a(n)
0	1
1	6
2	144
3	23400
4	26620002
5	216778910040
6	13069351570163616
7	6019308484501930839936
8	21708290476794620365667887680
9	624502420526473667139055032092300382

[1,6,144,23400,26620002,216778910040, 13069351570163616,6019308484501930839936, 21708290476794620365667887680, 624502420526473667139055032092300382]