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 A241562 #48 Jan 06 2017 08:14:13 %S A241562 1,2,4,6,8,9,12,15,16,18,20,24,25,28,30,32,35,36,40,42,45,48,49,50,54, %T A241562 56,60,63,64,66,70,72,77,80,81,84,88,90,91,96,98,99,100,104,108,110, %U A241562 112,117,120,121,126,128,130,132,135,140,143,144,150,153,154,156,160 %N A241562 Duplicate of A071562. %K A241562 dead %O A241562 1,2