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A193481 as a simple table

n a(n)
1 0
2 2
3 8
4 127
5 3686
6 285929
7 47398400
8 18127384939
9 15993244772677
10 32531416116323498
11 152344987111028997103
12 1640044640940871976733780

[0,2,8,127,3686,285929,47398400,18127384939,
 15993244772677,32531416116323498,
 152344987111028997103,1640044640940871976733780]

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Last modified August 12 23:52 EDT 2022. Contains 356077 sequences. (Running on oeis4.)