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A140454
as a simple table
n
a(n)
1
4
2
13
3
52
4
259
5
1595
6
10548
7
74914
8
563533
9
4387106
[4,13,52,259,1595,10548,74914,563533,4387106]
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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)