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A267575 as a simple table

n a(n)
3 20
4 1932
5 269040
6 60018480
7 20842305120
8 10739272592160
9 7859814146553600
10 7880871595516819200
11 10509569407728543398400
12 18186461035281996953126400
13 39999355842324635340366182400
14 109852416743246886658078908979200
15 371006429409575280027759776435712000

[20,1932,269040,60018480,20842305120,
 10739272592160,7859814146553600,
 7880871595516819200,10509569407728543398400,
 18186461035281996953126400,
 39999355842324635340366182400,
 109852416743246886658078908979200,
 371006429409575280027759776435712000]

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Last modified October 4 04:26 EDT 2022. Contains 357237 sequences. (Running on oeis4.)