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A015340 as a simple table

n a(n)
7 1
8 -1640
9 4035220
10 -8509702520
11 18843459775162
12 -41041673208656120
13 89881489830655851460
14 -196480936769813691291560
15 429769342296322230713871283
16 -939857780045414554730512966640 

[1,-1640,4035220,-8509702520,18843459775162,
 -41041673208656120,89881489830655851460,
 -196480936769813691291560,
 429769342296322230713871283,
 -939857780045414554730512966640]

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Last modified April 24 18:17 EDT 2024. Contains 371962 sequences. (Running on oeis4.)