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A068249 formatted as a simple table:

n a(n)
3 1
4 123933504
5 607054532700510
6 42295002762341131520
7 221621606435023540827375

[1,123933504,607054532700510,42295002762341131520,
 221621606435023540827375]

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.


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