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A006805
as a simple table
n
a(n)
0
4
1
-4
2
0
3
22
4
-44
5
32
6
100
7
-352
8
492
9
166
10
-2268
11
4914
12
-3212
13
-11083
[4,-4,0,22,-44,32,100,-352,492,166,-2268,4914, -3212,-11083]