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 A118544 #23 Oct 17 2014 22:26:38
%S A118544 2,4,8,14,24,40,66,106,174,286,480,814,1412,2480,4476,8184,15230,
%T A118544 28652,54488,104262,201266,390090,760234,1486030,2914492,5728506,
%U A118544 11289420,22279222,44046072,87181188,172777354,342724456,680524908,1352154964,2688763324
%N A118544 Number of subsets A of {1,2,...,n} with |A+A| = |A-A|.
%C A118544 Keywords: sum-dominant sets, MSTD sets.
%C A118544 Some authors work with subsets of [0..n-1], others with subsets of [1..n].
%H A118544 James Wilcox and Giovanni Resta, <a href="/A118544/b118544.txt">Table of n, a(n) for n = 1..40</a> (first 35 terms from James Wilcox)
%e A118544 a(4)=14: two of the sixteen subsets of {1,2,3,4} have |A+A|<|A-A| (specifically, {1,3,4} and {1,2,4}).
%Y A118544 Cf. A222807, A222808, A140794.
%K A118544 nonn
%O A118544 1,1
%A A118544 _Kevin O'Bryant_, May 07 2006
%E A118544 a(21)-a(29) from _Robert Gerbicz_, Nov 19 2010
%E A118544 a(30)-a(35) from _James Wilcox_, Jul 22 2013