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A202180
as a simple table
n
a(n)
1
1
2
1
3
3
4
9
5
31
6
115
7
474
8
2097
9
9967
10
50315
11
268442
12
1505463
13
8840306
14
54169431
[1,1,3,9,31,115,474,2097,9967,50315,268442, 1505463,8840306,54169431]
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Last modified April 25 13:12 EDT 2024. Contains 371969 sequences. (Running on oeis4.)
