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A280117 as a simple table

n a(n)
1 1
2 2
3 6
4 96
5 480
6 103680
7 725760
8 743178240
9 60197437440
10 60197437440000
11 662171811840000
12 1977234435405250560000
13 25704047660268257280000
14 70531906779776097976320000
15 238045185381744330670080000000
16 249608468306847943276709806080000000

[1,2,6,96,480,103680,725760,743178240,60197437440,
 60197437440000,662171811840000,
 1977234435405250560000,25704047660268257280000,
 70531906779776097976320000,
 238045185381744330670080000000,
 249608468306847943276709806080000000]

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Last modified November 30 02:42 EST 2020. Contains 338781 sequences. (Running on oeis4.)