id:A162918 - OEIS Search Results

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Natural numbers n such that there are s and w satisfying 0 < s < w and 2*s + 5*w = n.

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12, 17, 19, 22, 24, 26, 27, 29, 31, 32, 33, 34, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Number of equal microtone intervals dividing a musical octave, so that it is (formally) possible to compose one octave (according to the diatonic scale) of two semi-tone-steps and five whole-tone-steps, each being a multiple of the microtone interval.`
	LINKS	`Analysis of equal temperament tuning systems (German language)`
	EXAMPLE	`12 = 21 + 52` `17 = 21 + 53` `19 = 22 + 53` `22 = 21 + 54` `...`
	PROGRAM	`(Other) Haskell expression:` `filter (\n -> [ (s, w) \| s<-[1..n], w<-[(s+1)..n], 2s+5w == n ] /= []) [1..]`
	CROSSREFS	`Sequence in context: A087657 A059390 A064825 this_sequence A105018 A154488 A095099` `Adjacent sequences: A162915 A162916 A162917 this_sequence A162919 A162920 A162921`
	KEYWORD	`nonn`
	AUTHOR	`Jan Behrens (jbe-oeis(AT)magnetkern.de), Jul 17 2009`

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.

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