A097426 Integer part of the circumference of circles with prime diameters.

6, 9, 15, 21, 34, 40, 53, 59, 72, 91, 97, 116, 128, 135, 147, 166, 185, 191, 210, 223, 229, 248, 260, 279, 304, 317, 323, 336, 342, 354, 398, 411, 430, 436, 468, 474, 493, 512, 524, 543, 562, 568, 600, 606, 618, 625, 662, 700, 713, 719, 731, 750, 757, 788, 807

Offset

1,1

Links

Table of n, a(n) for n=1..55.

Formula

Circumference = Pi*D.

Example

If D = 11. floor(Pi*11) = 34, the fifth entry.

Maple

seq(floor(ithprime(i)*Pi), i=1..100); # Robert Israel, Feb 09 2015

Mathematica

Table[Floor[Pi Prime[n]], {n, 50}] (* Waldemar Puszkarz, Feb 09 2015 *)

Prog

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

Crossrefs

Sequence in context: A316047 A168544 A001748 * A075278 A316048 A102971

Adjacent sequences: A097423 A097424 A097425 * A097427 A097428 A097429

Keyword

nonn

Author

Cino Hilliard, Aug 22 2004

Status

approved