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A157305 as a simple table

n a(n)
0 1
1 1
2 -2
3 0
4 26
5 0
6 -1378
7 0
8 141202
9 0
10 -22716418
11 0
12 5218302090
13 0
14 -1619288968386
15 0
16 653379470919714
17 0
18 -333014944014777730
19 0
20 209463165121436380282
21 0
22 -159492000935562428176162
23 0
24 144654795258284936534929586
25 0

[1,1,-2,0,26,0,-1378,0,141202,0,-22716418,0,
 5218302090,0,-1619288968386,0,653379470919714,0,
 -333014944014777730,0,209463165121436380282,0,
 -159492000935562428176162,0,
 144654795258284936534929586,0]

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Last modified October 16 23:55 EDT 2021. Contains 348048 sequences. (Running on oeis4.)