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 A226708 #19 Jun 17 2013 13:02:00 %S A226708 1,1,1,11,77,1081,142531,41758027,1206670783,10654858617041 %N A226708 Least number k such that 6^(2^i) + k is prime for i = 0,1,..,n-1. %C A226708 a(5) = 77 because k = 77 is the minimal k such that N = 6^(2^i) + k is prime for i = 0, 1, 2, 3, 4; N = 83, 113, 1373, 1679693, 2821109907533. But 6^(2^5) + 77 is divisible by 79 and another prime. %Y A226708 Cf. A129613, A225560, A226281, A226707. %K A226708 nonn,more %O A226708 1,4 %A A226708 _Robin Garcia_, Jun 15 2013 %E A226708 a(10) from _Giovanni Resta_, Jun 16 2013