login

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 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Numbers n such that 90*n + 17 and 90*n + 19 are twin primes.
1

%I #15 Feb 10 2015 10:30:42

%S 0,1,2,9,14,22,23,25,35,36,39,46,48,50,53,55,60,65,77,79,81,83,86,93,

%T 98,111,116,130,148,154,165,168,189,191,193,196,197,198,203,210,226,

%U 230,231,232,246,252,256,263,281,284,287,301,308,310,312,314,317,347

%N Numbers n such that 90*n + 17 and 90*n + 19 are twin primes.

%C All matching entries for A202115 and A196000 are twin primes.

%H Harvey P. Dale, <a href="/A224855/b224855.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Range[0, 499], PrimeQ[90# + 17] && PrimeQ[90# + 19] &] (* Copied from: _Alonso del Arte_, Jul 22 2013 *)

%Y Cf. A202115, A196000.

%K nonn

%O 1,3

%A _J. W. Helkenberg_, Jul 22 2013