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 A064728 #1 May 16 2003 03:00:00 %S A064728 3,5,6,7,11,12,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83, %T A064728 89,97,101,103,107,109,113,117,125,127,131,137,139,149,151,157,163, %U A064728 167,173,179,181,191,193,197,198,199,211,223,227,229,233,239,241,251,257 %N A064728 Solutions to A064494(n) = 2(n+1). %Y A064728 A064494. %K A064728 nonn %O A064728 1,1 %A A064728 Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Oct 17 2001