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A006393
as a simple table
n
a(n)
2
1
3
4
4
9
5
32
6
132
7
597
8
3064
9
17114
10
102274
11
643907
12
4219540
[1,4,9,32,132,597,3064,17114,102274,643907, 4219540]
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Last modified April 25 11:39 EDT 2024. Contains 371969 sequences. (Running on oeis4.)
