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 A282352 #17 Feb 15 2017 09:38:37 %S A282352 2,3,3,3,3,3389,63559 %N A282352 Smallest value of x + y such that x^(2^k) + y^(2^k) is prime for every k = 0..n, where x > y are nonnegative integers. %e A282352 a(0) = 2 because 2^(2^0) + 0^(2^0) = 2. %e A282352 a(1) = 3 because 2^(2^0) + 1^(2^0) = 3 and 2^(2^1) + 1^(2^1) = 5 are prime. %e A282352 a(2) = 3 because 2^(2^0) + 1^(2^0) = 3, 2^(2^1) + 1^(2^1) = 5, and 2^(2^2) + 1^(2^2) = 17 are prime. %e A282352 a(n) x y %e A282352 ----- ----- ----- %e A282352 2 2 0 %e A282352 3 2 1 %e A282352 3 2 1 %e A282352 3 2 1 %e A282352 3 2 1 %e A282352 3389 2669 720 %e A282352 63559 34559 29000 %Y A282352 Cf. A111635. %K A282352 nonn,more %O A282352 0,1 %A A282352 _Altug Alkan_, Feb 12 2017 %E A282352 a(6) from _Max Alekseyev_, Feb 14 2017