The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A152294 Primes of the form : (p-n)/(n+1)=prime and (n+1)*p+n=prime. n=4. 3
 29, 89, 419, 509, 659, 1259, 1289, 1319, 1949, 2099, 2309, 2339, 2609, 2939, 3989, 4049, 6089, 6599, 7559, 8609, 9239, 9539, 10709, 12659, 12899, 13469, 13499, 18119, 20399, 21089, 21269, 21419, 22469, 23369, 26669, 27539, 28559, 30059, 30449 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS This is the general form : (p-n)/(n+1)=primeand(n+1)*p+n=prime; 'Safe' primes and'Sophie Germain' primes just one part of this general form; If n=1 then we got'Safe' primes and'Sophie Germain' primes. LINKS Table of n, a(n) for n=1..39. MATHEMATICA lst={}; n=4; Do[p=Prime[k]; If[PrimeQ[(p-n)/(n+1)]&&PrimeQ[(n+1)*p+n], AppendTo[lst, p]], {k, 7!}]; lst CROSSREFS Cf. A059455, A152292, A152293. Sequence in context: A141883 A142791 A325073 * A201487 A317537 A107940 Adjacent sequences: A152291 A152292 A152293 * A152295 A152296 A152297 KEYWORD nonn AUTHOR Vladimir Joseph Stephan Orlovsky, Dec 02 2008 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 June 12 20:44 EDT 2024. Contains 373360 sequences. (Running on oeis4.)