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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A140564 List of prime quartets (k - 7, k - 5, k + 5, k + 7). 1
 5, 7, 17, 19, 17, 19, 29, 31, 29, 31, 41, 43, 59, 61, 71, 73, 137, 139, 149, 151, 179, 181, 191, 193, 227, 229, 239, 241, 269, 271, 281, 283, 419, 421, 431, 433, 809, 811, 821, 823, 1019, 1021, 1031, 1033, 1049, 1051, 1061, 1063, 1277, 1279, 1289, 1291, 1289 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 EXAMPLE The quartets are: (5, 7, 17, 19), if k=12; (17, 19, 29, 31), if k=24; (29, 31, 41, 43), if k=36; etc. MATHEMATICA Flatten[#+{-7, -5, 5, 7}&/@Select[Range[2, 2000, 2], And@@PrimeQ[#+{-7, -5, 5, 7}]&]] (* Harvey P. Dale, Dec 13 2013 *) CROSSREFS Sequence in context: A224070 A075089 A075305 * A253085 A078764 A216731 Adjacent sequences: A140561 A140562 A140563 * A140565 A140566 A140567 KEYWORD nonn AUTHOR Juri-Stepan Gerasimov, Jul 03 2008 EXTENSIONS Corrected (two quartets inserted) by R. J. Mathar, Apr 25 2010 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 May 29 13:20 EDT 2023. Contains 363042 sequences. (Running on oeis4.)