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A002693
as a simple table
n
a(n)
0
0
1
1
2
6
3
28
4
125
5
527
6
2168
7
8781
8
35155
9
139531
10
550068
[0,1,6,28,125,527,2168,8781,35155,139531,550068]
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Last modified April 25 04:42 EDT 2024. Contains 371964 sequences. (Running on oeis4.)