Number of regions formed when every pair of vertices of a regular n-gon are joined by an infinite line.

A345025

Number of regions formed when every pair of vertices of a regular n-gon are joined by an infinite line.

Terms

    a(0) =1a(1) =2a(2) =7a(3) =16a(4) =36a(5) =72a(6) =141a(7) =232a(8) =424a(9) =630a(10) =1035a(11) =1284a(12) =2172a(13) =2716a(14) =4081a(15) =4848a(16) =7056a(17) =7290a(18) =11439a(19) =12960a(20) =17620a(21) =19712a(22) =26037a(23) =26568a(24) =37176a(25) =40638a(26) =51571a(27) =55832a(28) =69804a(29) =64440

External references