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 A177830 #2 Mar 30 2012 17:26:35 %S A177830 1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,4,2,2,2,2,2,2,4,4,4,6,2,2,4,2,2,4, %T A177830 2,2,2,2,6,2,4,4,4,2,4,2,4,2,2,6,2,2,2,2,2,2,4,2,4,2,2,4,4,2,4,2,2,4, %U A177830 2,4,4,2,2,2,4,2,2,4,2,2,4,4,2,2,4,2,2,2,2,6,4,2,4,2,2,2,2,4,2,4,2,2,2,2,2 %N A177830 Values of k in A176983. %C A177830 All terms except the first are even. %F A177830 a(n)=sqrt(nextprime((A176983(n))^2)-(A176983(n))^2) %Y A177830 Cf. A176983. %K A177830 nonn %O A177830 1,2 %A A177830 _Zak Seidov_, May 14 2010