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

A332421

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

Terms

    a(0) =154a(1) =2754a(2) =16858a(3) =55098a(4) =142318a(5) =298350a(6) =568162a(7) =975294a(8) =1585666a(9) =2426292a(10) =3588508a(11) =5093604a(12) =7067422a(13) =9523746a(14) =12612214a(15) =16351218a(16) =20924029a(17) =26326026a(18) =32789107a(19) =40289238a(20) =49093282a(21) =59181228a(22) =70852528

External references