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A186931 as a simple table

n a(n)
1 0
2 104
3 1840
4 59720
5 3026432
6 264604776
7 35582947920
8 8132915749352
9 2989994168957168

[0,104,1840,59720,3026432,264604776,35582947920,
 8132915749352,2989994168957168]

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Last modified June 29 05:16 EDT 2022. Contains 354910 sequences. (Running on oeis4.)