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 A216381 #5 Sep 06 2012 14:17:53 %S A216381 1,12,36,192,250,1258,1872,1992,3544,2952,3576,3756,2016,1764,4356, %T A216381 2268,2376,2472,2280,5184,2988,11736,11832,12168,13200,10258,20176, %U A216381 10528,21472,15228,12596,12958,12576,19872,16384,33568,12348,35440,14256,44512 %N A216381 Phi(n) values in A115921. %H A216381 V. Raman, <a href="/A216381/b216381.txt">Table of n, a(n) for n = 1..10000</a> %Y A216381 Cf. A000010, A115921. %K A216381 nonn,base %O A216381 1,2 %A A216381 _V. Raman_, Sep 06 2012