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A091756 as a simple table

n a(n)
4 1
5 220
6 48720
7 14463680
8 5762556800
9 3000655257600
10 1987324218880000
11 1634736979972096000
12 1636859558116823040000
13 1961447726093804748800000
14 2772502956616965206835200000
15 4565871212782705024303104000000

[1,220,48720,14463680,5762556800,3000655257600,
 1987324218880000,1634736979972096000,
 1636859558116823040000,1961447726093804748800000,
 2772502956616965206835200000,
 4565871212782705024303104000000]

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Last modified October 21 05:28 EDT 2021. Contains 348141 sequences. (Running on oeis4.)