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A008563 as a simple table

n a(n)
1 2
2 80
3 38400
4 77875200
5 449711308800
6 5935407169536000
7 155268186793574400000
8 7282309435397819596800000
9 568366274740400734548787200000
10 69683365216674756749626756300800000
11 12818556197716658801397242655670272000000
12 3408069131098061826431206876376696094720000000 

[2,80,38400,77875200,449711308800,
 5935407169536000,155268186793574400000,
 7282309435397819596800000,
 568366274740400734548787200000,
 69683365216674756749626756300800000,
 12818556197716658801397242655670272000000,
 3408069131098061826431206876376696094720000000]

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Last modified May 1 05:44 EDT 2024. Contains 372148 sequences. (Running on oeis4.)