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 A101287 #6 Feb 05 2014 11:26:42
%S A101287 92,104,117,139,156,185,208,233,277,311,370,415
%N A101287 Rounded frequencies in Hz of the notes of the pentatonic music scale beginning at F#.
%C A101287 The scale is equal-tempered. ("Wohltemperiert", introduced by Johann Sebastian Bach.)
%H A101287 T. Yahaya Abdullah, <a href="http://www.angelfire.com/in2/yala/4scales.htm">Music Scales</a>, part of Synthesizers, Music and Television.
%H A101287 Wikipedia, <a href="http://en.wikipedia.org/wiki/Equal_temperament">Equal temperament</a>
%Y A101287 Cf. A071831, A071832, A071833.
%K A101287 more,nonn
%O A101287 0,1
%A A101287 Angela Johansson (angvi798(AT)student.liu.se), Dec 20 2004