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A009669 as a simple table

n a(n)
0 1
1 -2
2 12
3 -296
4 8208
5 -317088
6 22384832
7 -1922265216
8 200049877248
9 -28532108907008
10 4916900759571456
11 -987493645187344384
12 241526023834975735808
13 -69201642972421758361600

[1,-2,12,-296,8208,-317088,22384832,-1922265216,
 200049877248,-28532108907008,4916900759571456,
 -987493645187344384,241526023834975735808,
 -69201642972421758361600]

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Last modified February 4 13:47 EST 2023. Contains 360055 sequences. (Running on oeis4.)