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!)
 A123084 Prime quintets of form k, k+30, k+60, k+90, k+120. 1
 7, 37, 67, 97, 127, 11, 41, 71, 101, 131, 37, 67, 97, 127, 157, 107, 137, 167, 197, 227, 137, 167, 197, 227, 257, 151, 181, 211, 241, 271, 277, 307, 337, 367, 397, 359, 389, 419, 449, 479, 389, 419, 449, 479, 509, 401, 431, 461, 491, 521, 541, 571, 601, 631 (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 i:=1:for k from 1 to 2000 do if isprime(k) and isprime(k+30)and isprime(k+60) and isprime(k+90) and isprime(k+120)then a[i]:=k:a[i+1]:=k+30:a[i+2]:=k+60: a[i+3]:=k+90:a[i+4]:=k+120:i:=i+5 fi od: seq(a[n], n=1..i-1); MATHEMATICA Select[Flatten[Table[{n+(30*Range[0, 4])}, {n, Prime[Range[100]]}], 1], AllTrue[ #, PrimeQ]&]//Flatten (* The program uses the AllTrue function from Mathematica version 10 *) (* Harvey P. Dale, Feb 19 2017 *) CROSSREFS Cf. A001097. Sequence in context: A086110 A104914 A032588 * A123085 A128471 A168003 Adjacent sequences: A123081 A123082 A123083 * A123085 A123086 A123087 KEYWORD nonn AUTHOR Miklos Kristof, Sep 27 2006 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 December 7 14:31 EST 2022. Contains 358656 sequences. (Running on oeis4.)