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A188719
as a simple table
n
a(n)
1
2
2
7
3
25
4
115
5
670
6
4324
7
30657
8
229568
9
1775675
10
14156112
11
115500275
12
960392564
[2,7,25,115,670,4324,30657,229568,1775675, 14156112,115500275,960392564]
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Last modified August 22 02:48 EDT 2024. Contains 375354 sequences. (Running on oeis4.)