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A012596 as a simple table

n a(n)
0 1
1 2
2 4
3 -40
4 -688
5 23968
6 -1134784
7 188393088
8 -40676275968
9 10688526352896
10 -3523678949366784
11 1431294964438824960
12 -701609173130329731072
13 408385401482058726547456

[1,2,4,-40,-688,23968,-1134784,188393088,
 -40676275968,10688526352896,-3523678949366784,
 1431294964438824960,-701609173130329731072,
 408385401482058726547456]

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Last modified September 18 11:36 EDT 2020. Contains 337169 sequences. (Running on oeis4.)