A doodle I for a musical tuning system Erv Wilson called meta-pelog. Take the sequence a_n = a_{n-1} + a_{n-3} and the limit of the ratio of terms, then use this as a frequency ratio to build a circle. This forms 5, 7 and 9-note MOS scales, and is approximated very closely in 29EDO (a subset of 58!)
about 1 year ago