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A172941 as a simple table

n a(n)
1 0
2 4
3 2100
4 21224392
5 1776676349670
6 943257597506859240
7 2584986583431322279831286
8 30994847539761067648293062000000
9 1417657385775947212537904178152631764244

[0,4,2100,21224392,1776676349670,
 943257597506859240,2584986583431322279831286,
 30994847539761067648293062000000,
 1417657385775947212537904178152631764244]

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Last modified August 25 14:35 EDT 2019. Contains 326324 sequences. (Running on oeis4.)