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A002915 as a simple table

n a(n)
1 0
2 0
3 4
4 0
5 0
6 -8
7 60
8 -144
9 416
10 -1248
11 4200
12 -13248
13 42936
14 -138072
15 452840
16 -1480944
17 4883688
18 -16114784
19 53457696
20 -177637248 

[0,0,4,0,0,-8,60,-144,416,-1248,4200,-13248,42936,
 -138072,452840,-1480944,4883688,-16114784,
 53457696,-177637248]

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)