Place n equally spaced points on each side of an equilateral triangle, and join each of these points by a chord to the 2*n new points on the other two sides: sequence gives number of vertices in the resulting planar graph.

A366483

Place n equally spaced points on each side of an equilateral triangle, and join each of these points by a chord to the 2*n new points on the other two sides: sequence gives number of vertices in the resulting planar graph.

Terms

    a(0) =3a(1) =6a(2) =22a(3) =108a(4) =300a(5) =919a(6) =1626a(7) =3558a(8) =5824a(9) =9843a(10) =14352a(11) =23845a(12) =30951a(13) =47196a(14) =62773a(15) =82488a(16) =104544a(17) =144784a(18) =173694a(19) =230008a(20) =276388a(21) =336927a(22) =403452a(23) =509218a(24) =582417a(25) =702228a(26) =824956a(27) =969387a(28) =1098312a(29) =1321978

External references