A086154 - OEIS

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A086154 as a simple table

n	a(n)
0	1
1	3
2	126
3	2220075
4	33594090947249085
5	9812294412288780842726471233974791140221
6	747581321238203931168470352555568799370148397202082975882483140118428447896681620077224288595

[1,3,126,2220075,33594090947249085, 9812294412288780842726471233974791140221, 74758132123820393116847035255556879937014839720208\ 2975882483140118428447896681620077224288595]