A049414 - OEIS

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A049414 as a simple table

n	a(n)
1	1
2	3
3	54
4	3804
5	1022320
6	1065957628
7	4389587378792
8	72020744942708040
9	4721708591209396542528
10	1237892622263984613044109216
11	1298060581376190776821670648395840

[1,3,54,3804,1022320,1065957628,4389587378792, 72020744942708040,4721708591209396542528, 1237892622263984613044109216, 1298060581376190776821670648395840]