The number of regions inside a decagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.

A333139

The number of regions inside a decagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.

Terms

    a(0) =220a(1) =4220a(2) =25220a(3) =84280a(4) =217800a(5) =456640a(6) =873090a(7) =1501520a(8) =2436020a(9) =3736540a(10) =5523970a(11) =7830800a(12) =10879460a(13) =14665340a(14) =19398660a(15) =25173960a(16) =32203320a(17) =40502280a(18) =50458120a(19) =61995140a(20) =75517160

External references