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A152687 formatted as a simple table:

n a(n)
1 1
2 1
3 2
4 24
5 8640
6 746496000
7 201231433728000000
8 3554168771933456302080000000000
9 139840535301953855934724122328694784000000000000000 

[1,1,2,24,8640,746496000,201231433728000000,
 3554168771933456302080000000000,
 139840535301953855934724122328694784000000000000000]

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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