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 A102081 #31 Jan 10 2018 15:41:50 %S A102081 1,5,4,9,11,20,29,49,76,125,199,324,521,845,1364,2209,3571,5780,9349, %T A102081 15129,24476,39605,64079,103684,167761,271445,439204,710649,1149851 %N A102081 Duplicate of A068397. %K A102081 dead %O A102081 1,2