%I #13 Jul 10 2018 18:51:02
%S 2,4,5,9,10,14,16,19,21,24,26,31,35,39,40,45,59,60,65,74,79,80,86,91,
%T 100,105,109,114,115,116,119,124,126,129,130,131,135,136,145,149,150,
%U 151,159,170,171,175,179,180,185,186,189,194,199,205,206,210,219,221
%N Numbers k such that 4*k^2-11 is a prime.
%H Robert Israel, <a href="/A091271/b091271.txt">Table of n, a(n) for n = 1..10000</a>
%F a(n) = A090696(n)/2.
%p select(t -> isprime(4*t^2-11), [$2..1000]); # _Robert Israel_, Jul 10 2018
%o (PARI) is(n) = ispseudoprime(4*n^2-11) \\ _Felix Fröhlich_, Jul 10 2018
%o (GAP) Filtered([2..230],n->IsPrime(4*n^2-11)); # _Muniru A Asiru_, Jul 10 2018
%Y A091272 gives primes, A091273 gives prime index.
%K nonn
%O 1,1
%A _Ray Chandler_, Dec 27 2003
%E Offset changed by _Robert Israel_, Jul 10 2018