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A137540
as a simple table
n
a(n)
0
1
1
1
2
2
3
6
4
23
5
104
6
533
7
3026
8
18744
9
125284
10
895936
11
6809075
12
54697741
13
462353643
14
4097020158
15
37936453443
[1,1,2,6,23,104,533,3026,18744,125284,895936, 6809075,54697741,462353643,4097020158,37936453443]
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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)
