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A305356
as a simple table
n
a(n)
1
1
2
4
3
13
4
26
5
137
6
538
7
4429
8
33136
9
321576
10
4146990
11
63233103
[1,4,13,26,137,538,4429,33136,321576,4146990, 63233103]
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Last modified August 24 10:55 EDT 2024. Contains 375410 sequences. (Running on oeis4.)