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 A075519 Primes p such that floor(p/4) is prime. 5
 11, 13, 23, 29, 31, 47, 53, 71, 79, 127, 149, 151, 167, 173, 191, 239, 269, 271, 293, 317, 359, 389, 431, 439, 509, 557, 599, 607, 631, 653, 719, 727, 773, 797, 911, 919, 967, 1031, 1087, 1109 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 EXAMPLE 23 is a term, as 23 = 4*5 + 3. MATHEMATICA Select[Prime[Range[6! ]], PrimeQ[Floor[ #/4]]&] (* Vladimir Joseph Stephan Orlovsky, Nov 25 2009 *) PROG (MAGMA) [p: p in PrimesUpTo(2000)| IsPrime(Floor(p/4))]; // Vincenzo Librandi, Aug 04 2013 CROSSREFS Cf. A075518, A075521. Sequence in context: A208296 A289696 A023232 * A019406 A289688 A080790 Adjacent sequences:  A075516 A075517 A075518 * A075520 A075521 A075522 KEYWORD nonn AUTHOR Reinhard Zumkeller, Sep 19 2002 EXTENSIONS Definition corrected by Eric M. Schmidt, Aug 04 2013 STATUS approved

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Last modified May 28 16:37 EDT 2022. Contains 354119 sequences. (Running on oeis4.)