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A046988 as a simple table

n a(n)
0 -1
1 1
2 1
3 1
4 1
5 1
6 691
7 2
8 3617
9 43867
10 174611
11 155366
12 236364091
13 1315862
14 6785560294
15 6892673020804
16 7709321041217
17 151628697551
18 26315271553053477373
19 308420411983322
20 261082718496449122051
21 3040195287836141605382
22 5060594468963822588186

[-1,1,1,1,1,1,691,2,3617,43867,174611,155366,
 236364091,1315862,6785560294,6892673020804,
 7709321041217,151628697551,26315271553053477373,
 308420411983322,261082718496449122051,
 3040195287836141605382,5060594468963822588186]

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Last modified October 17 01:03 EDT 2019. Contains 328103 sequences. (Running on oeis4.)