A055318 - OEIS

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A055318 as a simple table

n	a(n)
7	7
8	1736
9	151704
10	8573040
11	385363440
12	15186346560
13	553400527680
14	19255141825920
15	652932709228800
16	21874544352460800
17	730877395478630400
18	24516805259429683200
19	829582077548941516800
20	28413517892377153536000

[7,1736,151704,8573040,385363440,15186346560, 553400527680,19255141825920,652932709228800, 21874544352460800,730877395478630400, 24516805259429683200,829582077548941516800, 28413517892377153536000]