A103895 - OEIS

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A103895 as a simple table

n	a(n)
1	3
2	3
3	6
4	31
5	18864
6	258624
7	733755680
8	13213440000
9	115884221549652
10	1372805558801047105280
11	40999368670243322750932
12	1855053929165456908669711085568
13	113895178720398409713058206857404800

[3,3,6,31,18864,258624,733755680,13213440000, 115884221549652,1372805558801047105280, 40999368670243322750932, 1855053929165456908669711085568, 113895178720398409713058206857404800]