cp's OEIS Frontend

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.

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A221363 Decimal expansion of the Pythagorean comma.

Original entry on oeis.org

1, 0, 1, 3, 6, 4, 3, 2, 6, 4, 7, 7, 0, 5, 0, 7, 8, 1, 2, 5
Offset: 1

Views

Author

Jonathan Sondow, Jan 19 2013

Keywords

Comments

In musical tuning, the Pythagorean comma is 12 fifths / 7 octaves = (3/2)^12 / 2^7.

Examples

			3^12 / 2^19 = 531441/524288 = 1.0136432647705078125

References

  • Larry Baggett, In the Dark on the Sunny Side: A Memoir of an Out-of-Sight Mathematician, Mathematical Association of America, 2012, p. 78.
  • Dave Benson, Music: A Mathematical Offering. Cambridge: Cambridge University Press (2006): 164.
  • J. H. Conway and R. K. Guy, The Book of Numbers, New York: Springer-Verlag, 1995, p. 257.

Links

Crossrefs

Cf. A005663, A005664, A010774, A046102.

Programs

  • Mathematica
    RealDigits[N[31441/524288, 50]][[1]]

Formula

A229948/A229943 - Omar E. Pol, Oct 25 2013
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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