A172622 - OEIS

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A172622 as a simple table

n	a(n)
1	0
2	1
3	21
4	2371
5	628080
6	342829125
7	344827336455
8	589985590963930
9	1614966163545077280
10	6736902064011471514050
11	41169485539316907099731250
12	356683733303639928299266819050
13	4261817244676586430350506540348800

[0,1,21,2371,628080,342829125,344827336455, 589985590963930,1614966163545077280, 6736902064011471514050,41169485539316907099731250, 356683733303639928299266819050, 4261817244676586430350506540348800]