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A007965 as a simple table

n a(n)
1 -1
2 -1
3 118
4 13983
5 48667074
6 13055867207
7 232630103648534
8 144115171092292831
9 8862938117851348434466
10 99999999999999579292766699799
11 191943424957750455095669944886980
12 8505622499821102144569548732108989899311 

[-1,-1,118,13983,48667074,13055867207,
 232630103648534,144115171092292831,
 8862938117851348434466,
 99999999999999579292766699799,
 191943424957750455095669944886980,
 8505622499821102144569548732108989899311]

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Last modified April 24 08:56 EDT 2024. Contains 371934 sequences. (Running on oeis4.)