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A155261 as a simple table

n a(n)
3 1
4 7
5 25
6 55
7 353
8 2143
9 18201
10 203783
11 2290841
12 37082423
13 818768313
14 20744782567
15 698778878809
16 29337409298279

[1,7,25,55,353,2143,18201,203783,2290841,37082423,
 818768313,20744782567,698778878809,29337409298279]

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Last modified December 12 20:12 EST 2019. Contains 329961 sequences. (Running on oeis4.)