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A168446 Primes p such that floor(p/5) is also prime. 2
11, 13, 17, 19, 29, 37, 59, 67, 89, 97, 149, 157, 239, 269, 307, 337, 359, 367, 397, 419, 449, 487, 509, 547, 569, 659, 757, 787, 839, 907, 967, 997, 1117, 1259, 1289, 1319, 1409, 1559, 1567, 1657, 1747, 1867, 1949, 1987, 2099, 2287, 2309, 2339, 2399, 2437, 2459 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
Select[Prime[Range[6! ]], PrimeQ[Floor[ #/5]]&]
PROG
(Magma) [p: p in PrimesUpTo(2500) | IsPrime(Floor(p/5))]; // Vincenzo Librandi, Apr 16 2013
CROSSREFS
Sequence in context: A186811 A038926 A356466 * A275467 A045798 A267277
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
Definition and values corrected by R. J. Mathar, Dec 06 2009
STATUS
approved

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Last modified October 1 14:06 EDT 2023. Contains 365826 sequences. (Running on oeis4.)