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A156518 as a simple table

n a(n)
2 2
3 12
4 326
5 16298
6 5919644
7 9055603332
8 108964188487952
9 6758216414353306068

[2,12,326,16298,5919644,9055603332,
 108964188487952,6758216414353306068]

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Last modified May 30 15:37 EDT 2020. Contains 334726 sequences. (Running on oeis4.)