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A286483 as a simple table

n a(n)
0 1
1 0
2 5
3 0
4 238
5 0
6 51508
7 0
8 35028576
9 0
10 59053389408
11 0
12 209726098354368
13 0
14 1397532391623302400
15 0
16 16043549794523492290560
17 0
18 297285345537576037788672000
19 0
20 8447414796960536731803240038400

[1,0,5,0,238,0,51508,0,35028576,0,59053389408,0,
 209726098354368,0,1397532391623302400,0,
 16043549794523492290560,0,
 297285345537576037788672000,0,
 8447414796960536731803240038400]

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Last modified January 28 15:20 EST 2022. Contains 350657 sequences. (Running on oeis4.)