A075289 - OEIS

A075289

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

42, 154, 266, 574, 994, 1106, 2674, 3206, 3514, 4382, 5306, 5446, 6538, 6706, 8666, 8834, 9814, 9926, 10654, 11494, 13174, 13594, 14266, 14434, 14546, 15274, 15806, 17486, 17906, 18214, 18242, 21994, 22358, 22694, 24094, 25858, 27314, 28406

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OFFSET

1,1

COMMENTS

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

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

EXAMPLE

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

MATHEMATICA

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

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

CROSSREFS

Cf. A075277-A075296.

Sequence in context: A188126 A189500 A350579 * A193571 A326384 A263285

Adjacent sequences: A075286 A075287 A075288 * A075290 A075291 A075292

KEYWORD

easy,nonn

AUTHOR

Zak Seidov, Sep 12 2002

STATUS

approved