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 A285936 #19 Jun 20 2017 23:48:53 %S A285936 0,0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,1,1,1,0,0,0,0,0,0,0,1,0,0,1,0,0,1,0, %T A285936 0,1,1,0,1,0,0,1,0,0,1,0,0,1,0,0,0,0,1,1,1,0,0,0,1,1,0,0,1,0,0,1,0,0, %U A285936 1,0,0,1,1,0,1,0,1,1,0,0,0,0,0,1,0,0,1,0,0,0,0,0,1,0,1,1,1,0,1,0,0,0,0,0,2 %N A285936 Number of rotations of the digits in n produced by n * x/y where x != y. %C A285936 Rotations with a leading digit of zero are omitted. %C A285936 If d is the number of nonzero digits in n, a(n) < d. %H A285936 Doug Bell, <a href="/A285936/b285936.txt">Table of n, a(n) for n = 10..10000</a> %e A285936 a(13) = 0 because there is no fraction x/y such that 13 * x/y = 31, the only rotation of 13; %e A285936 a(15) = 1 because 15 * 17/5 = 51, the only rotation 51; %e A285936 a(114) = 2 because 114 * 47/38 = 141 and 114 * 137/38 = 411, both the rotations of 114. %K A285936 nonn,base %O A285936 10,105 %A A285936 _Doug Bell_, Jun 14 2017