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A267323
as a simple table
n
a(n)
1
0
2
0
3
0
4
3
5
12
6
66
7
432
8
3240
9
27360
[0,0,0,3,12,66,432,3240,27360]
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Last modified April 25 08:27 EDT 2024. Contains 371964 sequences. (Running on oeis4.)