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A002428 as a simple table

n a(n)
1 0
2 1
3 -2
4 23
5 -44
6 563
7 -3254
8 88069
9 -11384
10 1593269
11 -15518938
12 31730711
13 -186088972
14 3788707301
15 -5776016314
16 340028535787
17 -667903294192
18 10823198495797
19 -5476065119726
20 409741429887649
21 -103505656241356
22 17141894231615609

[0,1,-2,23,-44,563,-3254,88069,-11384,1593269,
 -15518938,31730711,-186088972,3788707301,
 -5776016314,340028535787,-667903294192,
 10823198495797,-5476065119726,409741429887649,
 -103505656241356,17141894231615609]

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Last modified March 18 16:00 EDT 2019. Contains 321292 sequences. (Running on oeis4.)