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A064167 formatted as a simple table:

n a(n)
1 1
2 6
3 66
4 300
5 8220
6 980
7 50820
8 213080
9 17965080
10 18600120
11 2320468920
12 2384502120
13 412970037480
14 422245703880
15 430902992520
16 1756076802480 

[1,6,66,300,8220,980,50820,213080,17965080,
 18600120,2320468920,2384502120,412970037480,
 422245703880,430902992520,1756076802480]

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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