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A283420
as a simple table
n
a(n)
1
0
2
1
3
2
4
6
5
16
6
65
7
310
8
2316
9
26241
10
522596
11
18766354
[0,1,2,6,16,65,310,2316,26241,522596,18766354]
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Last modified April 24 12:31 EDT 2024. Contains 371937 sequences. (Running on oeis4.)