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A220719 as a simple table

n a(n)
1 1
2 2
3 30
4 2586
5 1485872
6 5717794568
7 141539684300104
8 23071475903430624024
9 24446209288705921026670236

[1,2,30,2586,1485872,5717794568,141539684300104,
 23071475903430624024,24446209288705921026670236]

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Last modified January 26 17:22 EST 2020. Contains 331280 sequences. (Running on oeis4.)