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A013524 as a simple table

n a(n)
0 1
1 0
2 -1
3 -1
4 -1
5 13
6 7951
7 21599
8 -294997
9 -275833
10 -60527057
11 -6338125867
12 37620769159
13 10425684579701
14 5113538085001361
15 -25594556368763237
16 -6013201989263028181
17 -3771502911169983097219
18 18335649295377317231411
19 669255665793644548301365603

[1,0,-1,-1,-1,13,7951,21599,-294997,-275833,
 -60527057,-6338125867,37620769159,10425684579701,
 5113538085001361,-25594556368763237,
 -6013201989263028181,-3771502911169983097219,
 18335649295377317231411,
 669255665793644548301365603]

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Last modified May 11 09:50 EDT 2021. Contains 343788 sequences. (Running on oeis4.)