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A008982
as a simple table
n
a(n)
0
1
1
2
2
5
3
21
4
102
5
640
6
4492
7
34047
8
272252
9
2268085
10
19502386
11
172113886
12
1551948268
[1,2,5,21,102,640,4492,34047,272252,2268085, 19502386,172113886,1551948268]
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Last modified April 18 04:56 EDT 2024. Contains 371767 sequences. (Running on oeis4.)
