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Greater of twin primes of the form (k^2 + 4, k^2 + 6).
2

%I #13 Jan 05 2020 05:55:13

%S 7,31,1231,4231,366031,819031,1155631,1311031,1575031,3822031,4389031,

%T 4515631,5880631,7102231,9333031,9954031,13213231,13432231,16120231,

%U 19140631,25654231,34987231,37393231,38875231,39375631,41152231,47955631,52345231,53655631,62647231,67486231

%N Greater of twin primes of the form (k^2 + 4, k^2 + 6).

%H Amiram Eldar, <a href="/A253640/b253640.txt">Table of n, a(n) for n = 1..10000</a>

%t Select[Range[8215]^2 + 6, And @@ PrimeQ[# - {0, 2}] &] (* _Amiram Eldar_, Jan 05 2020 *)

%o (PARI) for(x=1,9999,ispseudoprime(x^2+4)&&ispseudoprime(x^2+6)&&print1(x^2+6","))

%Y Cf. A001097, A001359, A006512, A085553, A085554, A253639.

%K nonn

%O 1,1

%A _M. F. Hasler_, Jan 25 2015