Number of edges in a complete bipartite graph where the n vertices of each part are placed on the vertices, and on opposite sides, of a regular 2n-gon.

A392973

Number of edges in a complete bipartite graph where the n vertices of each part are placed on the vertices, and on opposite sides, of a regular 2n-gon.

Terms

    a(0) =1a(1) =6a(2) =24a(3) =68a(4) =180a(5) =344a(6) =746a(7) =1320a(8) =1830a(9) =3470a(10) =5232a(11) =6748a(12) =10688a(13) =14646a(14) =15726a(15) =25784a(16) =33306a(17) =39896a(18) =53156a(19) =65892a(20) =72508a(21) =98126a(22) =118098a(23) =134560a(24) =167030a(25) =196542a(26) =220808a(27) =267140a(28) =308856a(29) =331928

External references