A172602 - OEIS

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A172602 as a simple table

n	a(n)
1	0
2	1
3	399072960
4	26630804377937061000
5	49825573548689359631837113344000
6	1415189158639246716651027917944817871202200000
7	396138136990560832867276344563606859994639454544654153984000

[0,1,399072960,26630804377937061000, 49825573548689359631837113344000, 1415189158639246716651027917944817871202200000, 39613813699056083286727634456360685999463945454465\ 4153984000]