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A180073 as a simple table

n a(n)
2 0
3 2
4 12
5 56
6 344
7 2486
8 19936
9 179772
10 1800566
11 19867748
12 238718608
13 3105919304
14 43474755484
15 652732780048
16 10446585803476
17 177631436657888 

[0,2,12,56,344,2486,19936,179772,1800566,19867748,
 238718608,3105919304,43474755484,652732780048,
 10446585803476,177631436657888]

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Last modified May 22 13:22 EDT 2024. Contains 372755 sequences. (Running on oeis4.)