Number of nonequivalent dissections of an n-gon into 3 polygons by nonintersecting diagonals up to rotation.

A003451

Number of nonequivalent dissections of an n-gon into 3 polygons by nonintersecting diagonals up to rotation.

Terms

    a(0) =1a(1) =4a(2) =8a(3) =16a(4) =25a(5) =40a(6) =56a(7) =80a(8) =105a(9) =140a(10) =176a(11) =224a(12) =273a(13) =336a(14) =400a(15) =480a(16) =561a(17) =660a(18) =760a(19) =880a(20) =1001a(21) =1144a(22) =1288a(23) =1456a(24) =1625a(25) =1820a(26) =2016a(27) =2240a(28) =2465a(29) =2720

External references