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A100905
as a simple table
n
a(n)
1
1
2
6
3
13
4
45
5
74
6
240
7
553
8
12348
9
13659
[1,6,13,45,74,240,553,12348,13659]
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Last modified August 22 14:32 EDT 2024. Contains 375369 sequences. (Running on oeis4.)