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A123237 formatted as a simple table:

n a(n)
1 1
2 -1
3 -12
4 144
5 2400
6 -28224
7 -1296000
8 50808384
9 2434614000
10 -85975622656
11 -8396400230400
12 691198592910336
13 65694715632000000
14 -4784543769600000000
15 -796566295447796966400
16 112616674749446400000000
17 17805426854398997299200000
18 -2223594618178251399873232896

[1,-1,-12,144,2400,-28224,-1296000,50808384,
 2434614000,-85975622656,-8396400230400,
 691198592910336,65694715632000000,
 -4784543769600000000,-796566295447796966400,
 112616674749446400000000,
 17805426854398997299200000,
 -2223594618178251399873232896]

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Last modified December 17 13:29 EST 2009. Contains 170826 sequences.


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