A223579 - OEIS

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A223579 as a simple table

n	a(n)
1	4
2	256
3	204800
4	1331200000
5	51224576000000
6	9249109442560000000
7	6561595711835340800000000
8	15895655898196756312883200000000
9	117344147980184981008663340646400000000

[4,256,204800,1331200000,51224576000000, 9249109442560000000,6561595711835340800000000, 15895655898196756312883200000000, 117344147980184981008663340646400000000]