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A059918 formatted as a simple table:

n a(n)
0 1
1 4
2 40
3 3280
4 21523360
5 926510094425920
6 1716841910146256242328924544640
7 5895092288869291585760436430706259332839105796137920554548480 

[1,4,40,3280,21523360,926510094425920,
 1716841910146256242328924544640,
 5895092288869291585760436430706259332839105796137920554548480]

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Last modified December 6 13:45 EST 2009. Contains 170429 sequences.

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