A157713 - OEIS

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A157713 as a simple table

n	a(n)
1	1
2	10
3	280
4	12600
5	776160
6	60540480
7	5708102400
8	630745315200
9	79894406592000
10	11408921261337600
11	1812981305892556800
12	317271728531197440000
13	60623305667038033920000
14	12557684745315021312000000

[1,10,280,12600,776160,60540480,5708102400, 630745315200,79894406592000,11408921261337600, 1812981305892556800,317271728531197440000, 60623305667038033920000, 12557684745315021312000000]