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A097426 Integer part of the circumference of circles with prime diameters. 0
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified August 19 04:00 EDT 2022. Contains 356216 sequences. (Running on oeis4.)