This site is supported by donations to The OEIS Foundation.

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A075289 Interprimes which are of the form s*prime, s=14. 1

%I

%S 42,154,266,574,994,1106,2674,3206,3514,4382,5306,5446,6538,6706,8666,

%T 8834,9814,9926,10654,11494,13174,13594,14266,14434,14546,15274,15806,

%U 17486,17906,18214,18242,21994,22358,22694,24094,25858,27314,28406

%N Interprimes which are of the form s*prime, s=14.

%C Interprimes of the form s*prime are in A075277-A075296 ( s = 2 - 21 ). Case s=1 is impossible.

%H Harvey P. Dale, <a href="/A075289/b075289.txt">Table of n, a(n) for n = 1..1000</a>

%e 266 is an interprime and 266/14 = 19 is prime.

%t s=14; Select[Table[(Prime[n+1]+Prime[n])/2, {n, 2, 4000}], PrimeQ[ #/s]&]

%t Select[Mean/@Partition[Prime[Range[2,3100]],2,1],PrimeQ[#/14]&] (* _Harvey P. Dale_, Feb 24 2015 *)

%Y Cf. A075277-A075296.

%K easy,nonn

%O 1,1

%A _Zak Seidov_, Sep 12 2002

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