A075519 Primes p such that floor(p/4) is prime.

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

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: A289696 A365313 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