A174241 - OEIS

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A174241

Primes p such that 2*p-3 and 4*p-5 are also prime.

3, 7, 13, 43, 67, 97, 127, 181, 211, 223, 331, 373, 457, 613, 727, 751, 757, 907, 967, 1021, 1033, 1171, 1201, 1231, 1453, 1471, 1483, 1747, 1933, 2011, 2137, 2437, 2473, 2503, 2521, 2617, 2857, 2953, 3067, 3163, 3541, 3607, 3823, 3847, 3943, 4057, 5167

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

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

MATHEMATICA

Select[Prime[Range[500]], PrimeQ[2 # - 3] && PrimeQ[4 # - 5] &] (* Vincenzo Librandi, Apr 10 2013 *)

PROG

(Magma) [p: p in PrimesUpTo(7000) | IsPrime(4*p-5) and IsPrime(2*p-3)];

CROSSREFS

Sequence in context: A147447 A062605 A191974 * A289556 A086208 A090968

Adjacent sequences: A174238 A174239 A174240 * A174242 A174243 A174244

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Mar 13 2010

STATUS

approved