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A009674 as a simple table

n a(n)
0 1
1 -2
2 -28
3 1160
4 -3504
5 -3908896
6 360691008
7 14544047232
8 -11198480094976
9 1531305962216960
10 340347851378082816
11 -234547726326061201408
12 32383387692585279868928
13 30186184832886791121723392

[1,-2,-28,1160,-3504,-3908896,360691008,
 14544047232,-11198480094976,1531305962216960,
 340347851378082816,-234547726326061201408,
 32383387692585279868928,
 30186184832886791121723392]

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Last modified May 9 22:30 EDT 2024. Contains 372354 sequences. (Running on oeis4.)