This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A265124 #16 Dec 02 2015 12:23:53
%S A265124 1,2,3,4,5,6,7,12,45,64,121,144,238,261,415,2296,2847
%N A265124 Integers n such that A002110(n) + A006450(n) is prime.
%C A265124 Corresponding primes are 5, 11, 41, 227, 2341 and 30071.
%C A265124 1, 4, 64, 121, 144 are squares for initial terms of sequence. Are there any other squares in this sequence?
%e A265124 a(1) = 1 because 2 + 3 = 5 is prime.
%e A265124 a(2) = 2 because 2*3 + 5 = 11 is prime.
%e A265124 a(3) = 3 because 2*3*5 + 11 = 41 is prime.
%t A265124 Select[Range@ 500, PrimeQ[Product[Prime@ k, {k, #}] + Prime@ Prime@ #] &] (* _Michael De Vlieger_, Dec 02 2015 *)
%o A265124 (PARI) lista(nn) = {s = 1; for(k=1, nn, s *= prime(k); if(ispseudoprime(s + prime(prime(k))), print1(k, ", ")); ); }
%Y A265124 Cf. A002110, A006450.
%K A265124 nonn,more
%O A265124 1,2
%A A265124 _Altug Alkan_, Dec 02 2015