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

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A130735 Primes p such that p+2, n*(p+2)+6 and p*(p+2)+8 are also prime. 1
 5, 11, 2591, 4127, 10427, 11831, 15887, 28547, 56921, 60257, 61331, 62927, 65717, 70487, 74411, 77417, 77687, 81281, 87221, 100391, 104087, 115301, 116687, 121367, 124181, 129287, 148691, 149111, 158141, 173741, 199151, 208961 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 MAPLE a:=proc(n) local p: p:=ithprime(n): if isprime(p+2)=true and isprime(p*(p+2)+6) =true and isprime(p*(p+2)+8)=true then p else end if end proc: seq(a(n), n= 1 .. 20000); # Emeric Deutsch, Jul 25 2007 MATHEMATICA apQ[n_]:=Module[{n2=n(n+2)}, And@@PrimeQ[{n+2, n2+6, n2+8}]]; Select[Prime[Range[ 20000]], apQ] (* Harvey P. Dale, Apr 07 2013 *) CROSSREFS Sequence in context: A174957 A174955 A224095 * A322153 A022835 A022834 Adjacent sequences: A130732 A130733 A130734 * A130736 A130737 A130738 KEYWORD nonn AUTHOR Ray G. Opao, Jul 06 2007 EXTENSIONS More terms from Emeric Deutsch, Jul 25 2007 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 November 26 17:30 EST 2022. Contains 358362 sequences. (Running on oeis4.)