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A114938 as a simple table

n a(n)
0 1
1 0
2 2
3 30
4 864
5 39480
6 2631600
7 241133760
8 29083420800
9 4467125013120
10 851371260364800
11 197158144895712000
12 54528028997584665600
13 17752366094818747392000
14 6720318485119046923315200
15 2927066537906697348594432000
16 1453437879238150456164433920000

[1,0,2,30,864,39480,2631600,241133760,29083420800,
 4467125013120,851371260364800,197158144895712000,
 54528028997584665600,17752366094818747392000,
 6720318485119046923315200,
 2927066537906697348594432000,
 1453437879238150456164433920000]

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Last modified April 18 12:42 EDT 2019. Contains 322209 sequences. (Running on oeis4.)