A130550 - OEIS

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A130550 as a simple table

n	a(n)
1	1
2	12
3	180
4	1008
5	8400
6	118800
7	75675600
8	302702400
9	15437822400
10	26665329600
11	3226504881600
12	5708431713600
13	964724959598400
14	964724959598400
15	46628373047256000
16	340112838697632000
17	98292610383615648000

[1,12,180,1008,8400,118800,75675600,302702400, 15437822400,26665329600,3226504881600, 5708431713600,964724959598400,964724959598400, 46628373047256000,340112838697632000, 98292610383615648000]