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A152509 formatted as a simple table:

n a(n)
1 0
2 2
3 139
4 8036
5 452068
6 25331360
7 1418668912

[0,2,139,8036,452068,25331360,1418668912]

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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