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 A226707 #9 Jun 16 2013 04:36:24 %S A226707 2,6,6,48,384,1518,2037018,2037018,44279730804,424427587626 %N A226707 Least number k such that 5^(2^i) + k is prime for i = 0,1,..,n-1. %e A226707 a(5) = 384 because k = 384 is the minimal k such that N = 5^(2^i) + k is prime for i = 0, 1, 2, 3, 4; N = 389, 409, 1009, 391009, 152587891009. But 5^(2^5) + 384 is divisible by 797 and another prime. %Y A226707 Cf. A129613, A225560 A226281. %K A226707 nonn,more %O A226707 1,1 %A A226707 _Robin Garcia_, Jun 15 2013 %E A226707 a(10) from _Giovanni Resta_, Jun 16 2013