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A307556 as a simple table

n a(n)
1 0
2 2
3 4
4 192
5 25376
6 64264704
7 1295557991168
8 458135084510273536
9 2627612220112334649458688 

[0,2,4,192,25376,64264704,1295557991168,
 458135084510273536,2627612220112334649458688]

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Last modified September 15 16:35 EDT 2024. Contains 375938 sequences. (Running on oeis4.)