A158713 - OEIS

A158713

Primes p such that p1=Ceiling[p/2]+p is prime and p2=Ceiling[p1/2]+p is prime.

7, 47, 127, 167, 239, 439, 479, 607, 967, 1319, 1559, 1999, 2239, 2447, 2719, 3359, 4007, 4327, 4967, 5039, 5279, 5407, 5879, 6007, 6287, 7127, 7607, 8167, 8447, 8527, 8999, 9127, 9439, 9967, 10487, 11087, 11287, 11399, 11527, 11719, 11927, 11959, 12479

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..43.

MATHEMATICA

cpQ[n_]:=Module[{p1=Ceiling[n/2]+n}, AllTrue[{p1, Ceiling[p1/2]+n}, PrimeQ]]; Select[Prime[Range[2000]], cpQ] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, May 29 2017 *)

CROSSREFS

Cf. A158708, A158709, A158710, A158711, A158712

Sequence in context: A376246 A009219 A348394 * A142185 A158914 A046872

Adjacent sequences: A158710 A158711 A158712 * A158714 A158715 A158716

KEYWORD

nonn

AUTHOR

Vladimir Joseph Stephan Orlovsky, Mar 24 2009

EXTENSIONS

Corrected and incorrect Mathematica program deleted by Harvey P. Dale, May 29 2017

STATUS

approved