Octatonic scale

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The octatonic scale is Diminished[8], the 8-note MOS of diminished temperament. In 12edo, this is the scale of alternating whole and half steps, 21212121; in 44edo, it would be 83838383. It is used in both classical and jazz music; in jazz theory, often being called the diminished scale. Due to the even number of tones they have, the diminished scale and its fellow octatonic MOS are better served by reversing the roles of fifths and sixths, creating these regular triads.

http://en.wikipedia.org/wiki/Octatonic_scale