A097428 - OEIS

A097428

Integer part of the diameters of circles with prime circumferences.

0, 0, 1, 2, 3, 4, 5, 6, 7, 9, 9, 11, 13, 13, 14, 16, 18, 19, 21, 22, 23, 25, 26, 28, 30, 32, 32, 34, 34, 35, 40, 41, 43, 44, 47, 48, 49, 51, 53, 55, 56, 57, 60, 61, 62, 63, 67, 70, 72, 72, 74, 76, 76, 79, 81, 83, 85, 86, 88, 89, 90, 93, 97, 98, 99, 100, 105, 107, 110, 111, 112

(list; graph; refs; listen; history; text; internal format)

OFFSET

2,4

LINKS

Table of n, a(n) for n=2..72.

FORMULA

Diameter = Circumference/Pi.

EXAMPLE

If C = 5. floor(3/Pi) = 1, the third entry.

MATHEMATICA

Floor[#/Pi]&/@Prime[Range[80]] (* Harvey P. Dale, Dec 28 2012 *)

PROG