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 A059961 #14 Jan 01 2017 02:18:07 %S A059961 4,6,12,18,72,108,192,432,1152,2592,139968,472392,786432,995328, %T A059961 57395628,63700992,169869312,4076863488,10871635968,2348273369088, %U A059961 56358560858112,79164837199872,84537841287168,150289495621632 %N A059961 Duplicate of A027856. %K A059961 dead %O A059961 1,1