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A156458 as a simple table

n a(n)
2 2
3 6
4 68
5 876
6 43300
7 3026820
8 558858552
9 474109634808
10 1011861877473980
11 3520221010293816000 

[2,6,68,876,43300,3026820,558858552,474109634808,
 1011861877473980,3520221010293816000]

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Last modified March 30 19:10 EDT 2023. Contains 361622 sequences. (Running on oeis4.)