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A006487 formatted as a simple table:

n a(n)
0 1
1 3
2 13
3 253
4 218201
5 61323543802
6 5704059172637470075854
7 178059816815203395552917056787722451335939040 

[1,3,13,253,218201,61323543802,
 5704059172637470075854,
 178059816815203395552917056787722451335939040]

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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