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 A155008 Primes p such that (p-a)*(p+a)-+a*p are primes,a=4. 2
 3, 5, 7, 11, 19, 29, 31, 59, 101, 139, 239, 271, 829, 1031, 1201, 1439, 1511, 1531, 2251, 2609, 3929, 4349, 4969, 5449, 5639, 5711, 5801, 5881, 5981, 6521, 6569, 6701, 6949, 6959, 8221, 8831, 9001, 9181, 9209, 9419, 9511, 9929, 10139, 10711, 11839, 11981 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS 3*11-28=5, 3*11+28=61, ... LINKS MATHEMATICA lst={}; Do[p=Prime[n]; If[PrimeQ[(p-4)*(p+4)-4*p]&&PrimeQ[(p-4)*(p+4)+4*p], AppendTo[lst, p]], {n, 7!}]; lst Select[Prime[Range[1500]], AllTrue[(#-4)(#+4)+{4#, -4#}, PrimeQ]&] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, May 27 2020 *) CROSSREFS Cf. A125272, A053184, A038872, A141158, A038615, A098058, A038936, A089270, A140559, A154939, A155006, A155007 Sequence in context: A161420 A071997 A093442 * A175196 A077858 A327461 Adjacent sequences:  A155005 A155006 A155007 * A155009 A155010 A155011 KEYWORD nonn AUTHOR Vladimir Joseph Stephan Orlovsky, Jan 18 2009 STATUS approved

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Last modified August 6 15:50 EDT 2020. Contains 336255 sequences. (Running on oeis4.)