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A062408 Numbers k such that floor(Pi*k) is prime. 3
1, 10, 12, 14, 15, 17, 19, 31, 33, 35, 36, 42, 50, 52, 57, 61, 63, 71, 73, 77, 80, 82, 84, 98, 99, 101, 117, 119, 122, 124, 138, 140, 143, 147, 159, 166, 182, 187, 189, 201, 206, 208, 210, 220, 226, 229, 241, 245, 254, 262, 264, 273, 275, 289, 290, 296, 308, 311 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Harry J. Smith, Table of n, a(n) for n = 0..1000

MATHEMATICA

Select[Range[1, 400], PrimeQ[Floor[Pi #]] &] (* Bruno Berselli, Sep 30 2012 *)

PROG

(PARI) je=[]; for(n=0, 1000, if(isprime(floor(Pi*n)), je=concat(je, n), )); je

(PARI) { default(realprecision, 50); n=-1; for (m=1, 10^5, if (isprime(floor(Pi*m)), write("b062408.txt", n++, " ", m); if (n==1000, break)) ) } \\ Harry J. Smith, Aug 07 2009

CROSSREFS

Cf. A067559.

Sequence in context: A094879 A206286 A116023 * A127653 A050705 A095406

Adjacent sequences:  A062405 A062406 A062407 * A062409 A062410 A062411

KEYWORD

nonn

AUTHOR

Jason Earls, Jul 08 2001

STATUS

approved

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Last modified January 22 23:50 EST 2022. Contains 350504 sequences. (Running on oeis4.)