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 A068032 #6 Jan 19 2014 09:24:53
%S A068032 1,1,1,1,1,3,6,12,24,47,94,188,374,746,1490,2978,5958,11916,23832,
%T A068032 47664,95326,190652,381304,762604,1525204,3050404,6100804,12201612,
%U A068032 24403224,48806448,97612896,195225788,390451576,780903152,1561806296
%N A068032 Number of subsets of {1,2,3,...,n} that sum to 0 mod 11.
%F A068032 Empirical G.f.: -(2*x^11+x^9-x^5+x^4+x^3+x^2+x-1) / ((2*x-1)*(2*x^11-1)). [_Colin Barker_, Dec 22 2012]
%Y A068032 11th row of A068009.
%K A068032 nonn
%O A068032 0,6
%A A068032 _Antti Karttunen_, Feb 11 2002