42/17
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42/17 |1 1 0 1 0 0 -1>
1565.8254978341 cents
In 17-limit Just Intonation, 42/17 is the "septendecimal submajor tenth" measuring about 1565.8¢. It is the mediant between 37/15 and 5/2, as it is (37+5)/(15+2). A 17:21:42 root-3rd-P5 triad can be built with 21/17 as the bottom third and 2/1 as the top octave. This may thus represent a septendecimal "shading" of a minor triad.