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A187880 as a simple table

n a(n)
1 0
2 2
3 120
4 18624
5 9876480
6 20135116800
7 163839423283200
8 5348052945894113280
9 699612285096273924587520
10 366440137172271078986848665600
11 768105432116827516249785005978419200
12 6441762292785726797799215491828242028953600

[0,2,120,18624,9876480,20135116800,
 163839423283200,5348052945894113280,
 699612285096273924587520,
 366440137172271078986848665600,
 768105432116827516249785005978419200,
 6441762292785726797799215491828242028953600]

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Last modified September 17 06:52 EDT 2019. Contains 327119 sequences. (Running on oeis4.)