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A071608 as a simple table

n a(n)
0 1
1 1
2 0
3 4
4 0
5 0
6 80
7 48
8 0
9 3328
10 1920
11 0
12 270080
13 131328
14 0
15 3257736
16 16379904
17 0
18 5750476800
19 2942582784
20 0
21 1376249266176
22 706948005888
23 0
24 430415593603072

[1,1,0,4,0,0,80,48,0,3328,1920,0,270080,131328,0,
 3257736,16379904,0,5750476800,2942582784,0,
 1376249266176,706948005888,0,430415593603072]

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Last modified June 7 02:08 EDT 2023. Contains 363151 sequences. (Running on oeis4.)