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A012242 as a simple table

n a(n)
0 -1
1 6
2 -72
3 1456
4 -47104
5 2390784
6 -180612096
7 18625189888
8 -2431403622400
9 384624656646144
10 -72343735465672704
11 16067422146130345984
12 -4193787904779561730048
13 1276366494840535652499456

[-1,6,-72,1456,-47104,2390784,-180612096,
 18625189888,-2431403622400,384624656646144,
 -72343735465672704,16067422146130345984,
 -4193787904779561730048,1276366494840535652499456]

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Last modified September 16 10:36 EDT 2019. Contains 327094 sequences. (Running on oeis4.)