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A064681 formatted as a simple table:

n a(n)
0 1
1 1
2 1
3 4
4 122
5 2194432
6 1860799032530519872
7 26520691877985842130274557505490676978655683245437940

[1,1,1,4,122,2194432,1860799032530519872,
 26520691877985842130274557505490676978655683245437940]

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Last modified December 13 23:45 EST 2009. Contains 170824 sequences.


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