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A087918 as a simple table

n a(n)
1 1
2 3
3 21
4 210
5 6510
6 234360
7 29763720
8 4047865920
9 2068459485120
10 1092146608143360
11 2235624106869457920
12 4650098142288472473600
13 38088953883484878031257600
14 314462403262051153026062745600
15 10303989567687630131204997985075200
16 338960040818652280796119613717033779200

[1,3,21,210,6510,234360,29763720,4047865920,
 2068459485120,1092146608143360,
 2235624106869457920,4650098142288472473600,
 38088953883484878031257600,
 314462403262051153026062745600,
 10303989567687630131204997985075200,
 338960040818652280796119613717033779200]

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Last modified September 30 12:50 EDT 2022. Contains 357105 sequences. (Running on oeis4.)