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

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

(PARI) f(n) = forprime(x=1, n, print1(floor(x/Pi)", "))

Crossrefs

Sequence in context: A179464 A071191 A300903 * A126072 A265570 A265554

Adjacent sequences: A097425 A097426 A097427 * A097429 A097430 A097431

Keyword

nonn

Author

Cino Hilliard, Aug 22 2004

Status

approved