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A121096
as a simple table
n
a(n)
0
1
1
1
2
4
3
11
4
41
5
138
6
502
7
1747
8
6165
9
21420
[1,1,4,11,41,138,502,1747,6165,21420]
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Last modified August 24 20:58 EDT 2024. Contains 375417 sequences. (Running on oeis4.)