This site is supported by donations to The OEIS Foundation.

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A010774 Decimal expansion of 12th root of 2. 8
 1, 0, 5, 9, 4, 6, 3, 0, 9, 4, 3, 5, 9, 2, 9, 5, 2, 6, 4, 5, 6, 1, 8, 2, 5, 2, 9, 4, 9, 4, 6, 3, 4, 1, 7, 0, 0, 7, 7, 9, 2, 0, 4, 3, 1, 7, 4, 9, 4, 1, 8, 5, 6, 2, 8, 5, 5, 9, 2, 0, 8, 4, 3, 1, 4, 5, 8, 7, 6, 1, 6, 4, 6, 0, 6, 3, 2, 5, 5, 7, 2, 2, 3, 8, 3, 7, 6, 8, 3, 7, 6, 8, 6, 3, 9, 4, 5, 5, 6 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS This number figures in our standard 12-tone tuning of music today. It represents the frequency ratio of a semitone in equal temperament. The equal-tempered chromatic scale divides the octave, which has a ratio of 2:1, into twelve parts of equal ratio: [2^(n/12), 2^((n+1)/12)), 0 <= n <= 11. - Daniel Forgues, Feb 28 2013 REFERENCES D. Coulter, Digital Audio Processing. Berkeley, California: Focal Press (2000) p. 30 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..5000 Wikipedia, Twelfth_root_of_two EXAMPLE 2^(1/12) = 1.059463094359295264561825294946341700779204317494... MATHEMATICA RealDigits[N[2^(1/12), 100]][[1]] (* Alonso del Arte, Jan 06 2011 *) PROG (PARI) sqrtn(2, 12) \\ Charles R Greathouse IV, Apr 14 2014 CROSSREFS Cf. A103922. Cf. A214832, A254531. Sequence in context: A198990 A153356 A129956 * A272610 A198748 A196754 Adjacent sequences:  A010771 A010772 A010773 * A010775 A010776 A010777 KEYWORD nonn,cons AUTHOR STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.