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A051051 formatted as a simple table:

n a(n)
0 1
1 12
2 143
3 648000
4 12964479
5 1721036800000
6 2077805148460987
7 5041895218133760000000
8 14154229032767142723739127
9 51951524164830314976613655528865792 

[1,12,143,648000,12964479,1721036800000,
 2077805148460987,5041895218133760000000,
 14154229032767142723739127,
 51951524164830314976613655528865792]

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.

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