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A050276 as a simple table

n a(n)
0 1
1 -1
2 1
3 1
4 -1
5 -1
6 -1
7 1
8 19
9 11
10 1
11 -5
12 -901
13 -7
14 -1
15 5
16 367
17 18889
18 17
19 1
20 -5
21 -407
22 -6649
23 -2131
24 -1
25 -1
26 41
27 427
28 26405
29 88651
30 11153
31 23
32 1
33 -2603
34 -3781
35 -21543701
36 -66727
37 -8503
38 -13
39 -1

[1,-1,1,1,-1,-1,-1,1,19,11,1,-5,-901,-7,-1,5,367,
 18889,17,1,-5,-407,-6649,-2131,-1,-1,41,427,26405,
 88651,11153,23,1,-2603,-3781,-21543701,-66727,
 -8503,-13,-1]

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Last modified September 20 13:56 EDT 2021. Contains 347586 sequences. (Running on oeis4.)