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A071832
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Frequency ratios for notes of C-major scale starting at c = 1 (denominators).
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5
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1, 8, 4, 3, 2, 3, 8, 1, 4, 2, 3, 1, 3, 4, 1, 2, 1, 3, 1, 3, 2, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 3, 1, 3, 1
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| a(n+7) = a(n) for n >= 21. (1,1,1,3,1,3,1 repeats) - Rick L. Shepherd (rshepherd2(AT)hotmail.com), Apr 06 2006
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EXAMPLE
| The ratios are 1 (c), 9/8 (d), 5/4 (e), 4/3 (f), 3/2 (g), 5/3 (a), 15/8 (b); followed by these 7 numbers multiplied by successive powers of 2.
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PROG
| (PARI) r=[1, 9/8, 5/4, 4/3, 3/2, 5/3, 15/8]; for(n=0, 20, a=2^n*r; for(m=1, 7, print1(denominator(a[m]), ", "))) - Rick L. Shepherd (rshepherd2(AT)hotmail.com), Apr 06 2006
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CROSSREFS
| Cf. A071831, A071833.
Sequence in context: A173670 A050135 A109595 * A091475 A197482 A154211
Adjacent sequences: A071829 A071830 A071831 * A071833 A071834 A071835
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KEYWORD
| nonn,frac,easy,nice
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Jun 10 2002
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EXTENSIONS
| More terms from Rick L. Shepherd (rshepherd2(AT)hotmail.com), Apr 06 2006
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