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 A097260 #11 Mar 04 2014 00:10:12
%S A097260 0,13,182,195,2548,2561,2730,2743,35672,35685,35854,35867,38220,38233,
%T A097260 38402,38415,499408,499421,499590,499603,501956,501969,502138,502151,
%U A097260 535080,535093,535262,535275,537628,537641,537810,537823,6991712
%N A097260 Numbers whose set of base 14 digits is {0,D}, where D base 14 = 13 base 10.
%C A097260 n such that there exists a permutation p_1, ..., p_n of 1, ..., n such that i + p_i is a power of 14 for every i.
%H A097260 Harvey P. Dale, <a href="/A097260/b097260.txt">Table of n, a(n) for n = 1..1000</a>
%F A097260 a(n) = 13*A033050(n).
%F A097260 a(2n) = 14*a(n), a(2n+1) = a(2n)+13.
%t A097260 FromDigits[#,14]&/@Tuples[{0,13},6] (* _Harvey P. Dale_, Sep 22 2011 *)
%Y A097260 Cf. A001196, A005823, A097251-A097262.
%K A097260 nonn,base
%O A097260 1,2
%A A097260 _Ray Chandler_, Aug 03 2004