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 A117556 #5 Oct 02 2013 16:16:06 %S A117556 1,2,4,5,12,19,31,41,99,171,3125,11664,18355,84814,103169 %N A117556 Equal divisions of the octave of decreasing nine-limit Pepper ambiguity. %C A117556 We may define the n-limit Pepper ambiguity, for any odd number n greater than one, as the maximum of the ratios of the errors of the nearest approximation to the members of the n-limit tonality diamond to the next nearest. In the 9-limit, that means we look at the ratios of the errors for the nearest approximations to 3/2, 5/4, 5/3, 7/4, 7/5, 7/6, 9/8, 9/7 and 9/5 to the next nearest. %H A117556 Wikipedia, <a href="http://en.wikipedia.org/wiki/Tonality_diamond">Tonality diamond</a> %Y A117556 Cf. A117554, A117555, A117557, A117558, A117559, A005664, A117536, A117538. %K A117556 more,nonn %O A117556 0,2 %A A117556 _Gene Ward Smith_, Mar 28 2006