The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A153779 Numbers of the form 49*k, where 49*k+2 and 49*k-6 are both prime. 1
 2009, 4655, 4949, 9065, 9947, 13475, 14945, 15239, 17297, 25235, 26117, 32585, 33467, 37877, 39935, 44639, 47285, 52577, 56399, 59339, 59927, 61985, 62867, 64925, 72275, 75215, 75509, 76097, 79037, 82565, 86387, 89915, 92855, 94619 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS G. C. Greubel, Table of n, a(n) for n = 1..1000 FORMULA a(n) >> n log^2 n. - Charles R Greathouse IV, Aug 28 2016 EXAMPLE 2009 = 49*41 and both 2003 and 2011 are prime. MATHEMATICA 49*Select[Range[115000], PrimeQ[49*# + 2] && PrimeQ[49*# - 6] &] (* G. C. Greubel, Aug 28 2016 *) Select[49*Range[2000], AllTrue[#+{2, -6}, PrimeQ]&] (* Harvey P. Dale, Jul 01 2022 *) PROG (PARI) is(n)=n%294==245 && isprime(n+2) && isprime(n-6) \\ Charles R Greathouse IV, Aug 28 2016 CROSSREFS Sequence in context: A172780 A172807 A153822 * A332445 A162242 A249955 Adjacent sequences: A153776 A153777 A153778 * A153780 A153781 A153782 KEYWORD nonn AUTHOR John L. Drost, Jan 01 2009 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 31 00:50 EST 2023. Contains 359947 sequences. (Running on oeis4.)