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 A094505 #6 Sep 22 2016 05:44:01 %S A094505 2,16,64,2048 %N A094505 Powers of 2 which are not the sum of divisors of any other number. Powers of 2 present in A007369. %C A094505 The next term, 2^470, is too large to include. %F A094505 a(n) = 2^A078426(n). %Y A094505 Cf. A007369, A000203, A046528, A094502. %K A094505 nonn %O A094505 1,1 %A A094505 _Labos Elemer_, Jun 02 2004