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A019031 as a simple table

n a(n)
2 2
3 5
4 30
5 180
6 1028
7 6563
8 41042
9 262143
10 1737014
11 11717093
12 80135236
13 555094742
14 3884459568
15 27420679509
16 195037451422 

[2,5,30,180,1028,6563,41042,262143,1737014,
 11717093,80135236,555094742,3884459568,
 27420679509,195037451422]

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)