Number of regions in regular n-gon which are quadrilaterals (4-gons) when all its diagonals are drawn.

A067151

Number of regions in regular n-gon which are quadrilaterals (4-gons) when all its diagonals are drawn.

Terms

    a(0) =0a(1) =0a(2) =6a(3) =7a(4) =24a(5) =36a(6) =90a(7) =132a(8) =168a(9) =234a(10) =378a(11) =600a(12) =672a(13) =901a(14) =954a(15) =1444a(16) =1580a(17) =2520a(18) =2860a(19) =2990a(20) =3696a(21) =4800a(22) =5070a(23) =6750a(24) =7644a(25) =9309a(26) =7920a(27) =12927a(28) =12896a(29) =15576

External references