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A172808 as a simple table

n a(n)
1 0
2 0
3 55
4 157984
5 2461011960
6 148699584483880
7 29715346096043717550
8 17246529136870025302912000
9 26159597034338175244538552103907
10 95066344634881957233042525618261985200 

[0,0,55,157984,2461011960,148699584483880,
 29715346096043717550,17246529136870025302912000,
 26159597034338175244538552103907,
 95066344634881957233042525618261985200]

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Last modified April 18 08:27 EDT 2024. Contains 371769 sequences. (Running on oeis4.)