login
Numbers k such that k^2 + 11 and k^2 + 13 are primes.
1

%I #9 Mar 16 2017 04:00:20

%S 114,126,144,180,486,684,864,1080,1176,1866,1956,2166,2226,2454,2634,

%T 2880,3090,3474,4176,4314,5124,5586,5730,5820,6030,6276,6324,6456,

%U 6624,6846,6954,7110,7830,7914,8166,8556,8724,9054,9180,9576,9786,9816

%N Numbers k such that k^2 + 11 and k^2 + 13 are primes.

%H G. C. Greubel, <a href="/A113537/b113537.txt">Table of n, a(n) for n = 1..2500</a>

%t Select[Range[10000], PrimeQ[ #^2+11]&&PrimeQ[ #^2+13]&]

%Y Intersection of A114274 and A113536.

%K easy,nonn

%O 1,1

%A _Zak Seidov_, Jan 13 2006