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A222321
as a simple table
n
a(n)
1
1
2
0
3
4
4
52
5
674
6
38238
7
2284728
8
620488671
9
174162198742
10
206752746752932
[1,0,4,52,674,38238,2284728,620488671, 174162198742,206752746752932]
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Last modified March 28 14:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)