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A055727
as a simple table
n
a(n)
0
0
1
2
2
4
3
14
4
51
5
247
6
1405
7
8506
8
55228
[0,2,4,14,51,247,1405,8506,55228]
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Last modified April 23 23:26 EDT 2024. Contains 371917 sequences. (Running on oeis4.)