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 A163302 #31 Aug 08 2019 06:40:35 %S A163302 1,6,16,56,176,576,1856,6016,19456,62976,203776,659456,2134016, %T A163302 6905856,22347776,72318976,234029056,757334016,2450784256,7930904576, %U A163302 25664946176,83053510656,268766806016,869747654656,2814562533376,9108115685376,29474481504256 %N A163302 Duplicate of A084057. %K A163302 dead %O A163302 1,2 %A A163302 _Mark Dols_, Jul 24 2009