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A285485 as a simple table

n a(n)
1 0
2 0
3 2
4 2
5 0
6 0
7 44
8 260
9 0
10 0
11 33104
12 203712
13 0
14 0
15 75499696
16 621309008
17 0
18 0
19 492805156768
20 5068810602400
21 0
22 0
23 7346944632542720

[0,0,2,2,0,0,44,260,0,0,33104,203712,0,0,75499696,
 621309008,0,0,492805156768,5068810602400,0,0,
 7346944632542720]

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Last modified March 29 09:44 EDT 2024. Contains 371268 sequences. (Running on oeis4.)