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A006718 formatted as a simple table:

n a(n)
1 4
2 112
3 8432
4 909288
5 121106960
6 18167084064
7 2956370702688
8 510696155882492
9 92343039606440064
10 17311893232788414400
11 3342127071364266721200 

[4,112,8432,909288,121106960,18167084064,
 2956370702688,510696155882492,92343039606440064,
 17311893232788414400,3342127071364266721200]

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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.

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