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A211602
as a simple table
n
a(n)
2
0
3
1
4
3
5
7
6
20
7
70
8
287
9
1356
10
7248
[0,1,3,7,20,70,287,1356,7248]
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Last modified March 31 07:39 EDT 2023. Contains 361645 sequences. (Running on oeis4.)
