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A075751 Numbers n such that 210*n -/+ 13 are primes. 1
1, 3, 4, 8, 10, 14, 15, 16, 17, 18, 21, 27, 36, 41, 45, 47, 48, 50, 62, 67, 71, 83, 85, 94, 95, 96, 102, 105, 106, 118, 125, 129, 133, 136, 153, 154, 155, 157, 159, 160, 171, 176, 201, 202, 205, 212, 214, 231, 237, 246, 254, 258, 259, 263, 269, 270, 271, 276, 278 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

EXAMPLE

n=1: 210*1-13=197 and 210*1+13=223 are primes.

MATHEMATICA

Select[Range[1, 300], PrimeQ[210 # - 13]&&PrimeQ[210 # + 13]&] (* Vincenzo Librandi, Oct 05 2013 *)

PROG

(PARI) isok(n) = isprime(210*n+13) && isprime(210*n-13); \\ Michel Marcus, Oct 03 2013

(MAGMA) [n: n in [1..350] | IsPrime(210*n-13) and IsPrime(210*n+13)]; // Vincenzo Librandi, Oct 05 2013

CROSSREFS

Sequence in context: A024514 A114913 A111174 * A065153 A030497 A080085

Adjacent sequences:  A075748 A075749 A075750 * A075752 A075753 A075754

KEYWORD

easy,nonn

AUTHOR

Zak Seidov, Oct 08 2002

STATUS

approved

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Last modified August 9 04:21 EDT 2020. Contains 336319 sequences. (Running on oeis4.)