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A305571 as a simple table

n a(n)
1 1
2 0
3 0
4 48
5 480
6 0
7 1290240
8 25484820480
9 34482663290880

[1,0,0,48,480,0,1290240,25484820480,
 34482663290880]

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Last modified April 24 18:17 EDT 2024. Contains 371962 sequences. (Running on oeis4.)