%I #6 Feb 04 2015 09:12:26
%S 28,55,110,220,440,880,1760,3520
%N Fundamental piano frequencies in Hertz rounded to nearest integer.
%H J. Campbell, <a href="http://www.izzy.net/~jc/PSTInfo/Temper.html">The Equal Tempered Scale and Peculiarities of Piano Tuning</a>.
%H <a href="/index/Mu#music">Index entries for sequences based on music</a>
%F a(n)=round(27.5*2^n), n=0...7.
%Y Cf. A214832, A254531.
%K easy,fini,full,nonn
%O 0,1
%A _Ralf Stephan_, Feb 18 2003