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A001186 as a simple table

n a(n)
2 1
3 2
4 5
5 17
6 80
7 474
8 3841
9 39635
10 495991
11 7170657
12 116171803
13 2070451150
14 40130198979
15 839266928707
16 18826133329753 

[1,2,5,17,80,474,3841,39635,495991,7170657,
 116171803,2070451150,40130198979,839266928707,
 18826133329753]

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Last modified April 19 16:21 EDT 2024. Contains 371794 sequences. (Running on oeis4.)