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A073986 formatted as a simple table:

n a(n)
1 0
2 2
3 9
4 54
5 300
6 1296
7 6300
8 39312
9 262440
10 1679616

[0,2,9,54,300,1296,6300,39312,262440,1679616]

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Last modified December 20 13:54 EST 2009. Contains 171081 sequences.


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