Number of polygon edges formed by infinite lines when connecting all vertices and all points that divide the sides of an equilateral triangle into n equal parts.

A344896

Number of polygon edges formed by infinite lines when connecting all vertices and all points that divide the sides of an equilateral triangle into n equal parts.

Terms

    a(0) =3a(1) =21a(2) =186a(3) =705a(4) =2196a(5) =5046a(6) =10212a(7) =19149a(8) =31524a(9) =50049a(10) =77100a(11) =114633a(12) =159453a(13) =225978a(14) =298833a(15) =390069a(16) =508137a(17) =663426a(18) =824868a(19) =1040727a(20) =1258833a(21) =1532565a(22) =1859331a(23) =2254938a(24) =2628309a(25) =3130227a(26) =3664920a(27) =4261503a(28) =4917939a(29) =5742696

External references