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 A068035 #6 Sep 08 2022 13:32:07
%S A068035 1,1,1,1,1,2,5,10,19,37,73,147,293,586,1172,2342,4682,9362,18726,
%T A068035 37450,74900,149800,299596,599188,1198372,2396748,4793492,9586984,
%U A068035 19173968,38347928,76695848,153391688,306783384,613566760,1227133520,2454267040
%N A068035 Number of subsets of {1,2,3,...,n} that sum to 0 mod 14.
%F A068035 Empirical G.f.: -(2*x^13+x^12-3*x^11-x^10-x^9-x^8+2*x^7-x^6+x^4+x^3+x^2+x-1) / ((2*x-1)*(2*x^7-1)). [_Colin Barker_, Dec 22 2012]
%Y A068035 14th row of A068009.
%K A068035 nonn
%O A068035 0,6
%A A068035 _Antti Karttunen_, Feb 11 2002