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A015271 as a simple table

n a(n)
3 1
4 -51
5 3485
6 -219555
7 14107485
8 -901984419
9 57741320029
10 -3695215419555
11 236497451900765
12 -15135778281070755
13 968690748238618461
14 -61996192875273494691
15 3967756584209486471005
16 -253936417546335462858915

[1,-51,3485,-219555,14107485,-901984419,
 57741320029,-3695215419555,236497451900765,
 -15135778281070755,968690748238618461,
 -61996192875273494691,3967756584209486471005,
 -253936417546335462858915]

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Last modified April 7 10:56 EDT 2020. Contains 333301 sequences. (Running on oeis4.)