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A185424 as a simple table

n a(n)
0 1
1 -1
2 1
3 -1
4 19
5 -5
6 253
7 -61
8 3319
9 -1385
10 222557
11 -50521
12 422152729
13 -2702765
14 59833795
15 -199360981
16 439264083023
17 -19391512145
18 76632373664299
19 -2404879675441
20 4432283799315809
21 -370371188237525

[1,-1,1,-1,19,-5,253,-61,3319,-1385,222557,-50521,
 422152729,-2702765,59833795,-199360981,
 439264083023,-19391512145,76632373664299,
 -2404879675441,4432283799315809,-370371188237525]

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Last modified May 9 06:30 EDT 2021. Contains 343692 sequences. (Running on oeis4.)