A343947 Surface area to volume ratio of a right prism with unit height and whose base is a regular n-gon with side length 1 (rounded to the nearest integer).

9, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2

Offset: 3

Author

Wesley Ivan Hurt, May 04 2021

Keywords

• nonn

Crossrefs

Cf. A064313, A134030, A343946.

Programs

Mathematica

Table[Round[(4 + 2 Cot[Pi/n])/Cot[Pi/n]], {n, 3, 100}]

Formula

a(n) = round((4 + 2*cot(Pi/n))/cot(Pi/n)).