Number of regions in an equilateral triangular figure formed by the straight line segments connecting all vertices and all points that divide the sides into n equal parts.

A092867

Number of regions in an equilateral triangular figure formed by the straight line segments connecting all vertices and all points that divide the sides into n equal parts.

Terms

    a(0) =1a(1) =12a(2) =75a(3) =252a(4) =715a(5) =1572a(6) =3109a(7) =5676a(8) =9291a(9) =14556a(10) =22081a(11) =32502a(12) =44935a(13) =62868a(14) =83286a(15) =108384a(16) =140152a(17) =181710a(18) =225565a(19) =282978a(20) =342792a(21) =415614a(22) =502318a(23) =606642a(24) =708505a(25) =839874a(26) =983007a(27) =1141416a(28) =1315102a(29) =1529526

External references