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A086591 formatted as a simple table:

n a(n)
0 1
1 1
2 1
3 1
4 2
5 6
6 24
7 2520
8 18378360
9 6906955255200
10 5987137029832314231356979603166508647200
11 1000156941827668764767034398758639477404906113721462819980559968765060862592344000

[1,1,1,1,2,6,24,2520,18378360,6906955255200,
 5987137029832314231356979603166508647200,
 1000156941827668764767034398758639477404906113721462819980559968765060862592344000]

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


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