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A197753
as a simple table
n
a(n)
1
1
2
4
3
15
4
154
5
2560
6
77908
7
4327313
8
430599055
9
75914929553
10
23997418533210
[1,4,15,154,2560,77908,4327313,430599055, 75914929553,23997418533210]
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Last modified April 26 16:04 EDT 2024. Contains 372003 sequences. (Running on oeis4.)