OFFSET
1,1
COMMENTS
A254531(a(k)) = k, k = 1..88. - Reinhard Zumkeller, Feb 04 2015
LINKS
FORMULA
a(n) = floor[2^((n-49)/12)*440] (Hz) for 1 <= n <= 88.
EXAMPLE
Middle C is 261.626 Hz so a(40) = 261.
PROG
(JavaScript)
for (i=1; i<=88; i++) document.write(Math.floor(Math.pow(2, (i-49)/12)*440)+", ");
(PARI) a(n)=floor(440*2^((n-49)/12));
(Haskell)
a214832 = floor . (* 440) . (2 **) . (/ 12) . fromIntegral . subtract 49
-- Reinhard Zumkeller, Nov 23 2014
CROSSREFS
KEYWORD
nonn,fini,full
AUTHOR
Jon Perry, Mar 07 2013
STATUS
approved