A368720 - OEIS

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A368720 as a simple table

n	a(n)
0	1
1	3
2	69360
3	1522177267723200
4	391047538356893112890665992192000
5	6785985430272886334677590546861463643140253138288640000000

[1,3,69360,1522177267723200, 391047538356893112890665992192000, 67859854302728863346775905468614636431402531382886\ 40000000]