4-dimensional analog of centered polygonal numbers. Also number of regions created by sides and diagonals of a convex n-gon in general position.

A006522

4-dimensional analog of centered polygonal numbers. Also number of regions created by sides and diagonals of a convex n-gon in general position.

Terms

    a(0) =1a(1) =0a(2) =0a(3) =1a(4) =4a(5) =11a(6) =25a(7) =50a(8) =91a(9) =154a(10) =246a(11) =375a(12) =550a(13) =781a(14) =1079a(15) =1456a(16) =1925a(17) =2500a(18) =3196a(19) =4029a(20) =5016a(21) =6175a(22) =7525a(23) =9086a(24) =10879a(25) =12926a(26) =15250a(27) =17875a(28) =20826a(29) =24129

External references