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A289971
as a simple table
n
a(n)
0
1
1
1
2
2
3
4
4
9
5
20
6
49
7
114
8
277
9
665
10
1608
11
3875
[1,1,2,4,9,20,49,114,277,665,1608,3875]
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Last modified March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)