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A064845 formatted as a simple table:

n a(n)
1 1
2 1
3 2
4 5
5 31
6 1231
7 1917121
8 4667676800641
9 27640053867460068128570881
10 969475805641849161579046591814284573846079748476161 

[1,1,2,5,31,1231,1917121,4667676800641,
 27640053867460068128570881,
 969475805641849161579046591814284573846079748476161]

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.

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