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A013540 as a simple table

n a(n)
0 -1
1 7
2 -17
3 913
4 -93959
5 9405719
6 -8909477
7 211410621413
8 -6740064210937
9 2805742760628347
10 -761503407533329723
11 340317674208644677253
12 -38791272133810800467
13 1468818906393936912860264741

[-1,7,-17,913,-93959,9405719,-8909477,
 211410621413,-6740064210937,2805742760628347,
 -761503407533329723,340317674208644677253,
 -38791272133810800467,
 1468818906393936912860264741]

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Last modified May 17 23:07 EDT 2022. Contains 353779 sequences. (Running on oeis4.)