|
%I #9 Jun 13 2017 12:40:52
%S 2,4,10,16,26,28,38,40,44,46,58,70,80,82,88,94,98,110,116,128,130,136,
%T 140,142,154,164,178,194,200,208,212,214,220,224,236,248,250,254,256,
%U 268,278,284,298,310,320,322,332,334,338,362,392,406,422,424,458,460
%N Numbers n such that 5*n^2 + 9 is prime.
%e If n=154 then 5*n^2 + 9 = 118589 (prime).
%t Select[Range[500], PrimeQ[5*#^2 + 9] &] (* _Stefan Steinerberger_, Feb 26 2006 *)
%o (PARI) is(n)=isprime(5*n^2+9) \\ _Charles R Greathouse IV_, Jun 13 2017
%K nonn,easy
%O 1,1
%A _Parthasarathy Nambi_, Oct 18 2005
%E More terms from _Stefan Steinerberger_, Feb 26 2006
|
