1-3-5-9-11-13 eikosany
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A 13-odd-limit eikosany. This creates a scale of 1 33/32 13/12 11/10 9/8 143/120 39/32 99/80 13/10 429/320 11/8 117/80 143/96 3/2 13/8 33/20 143/80 9/5 11/6 39/20 2/1, with steps of 33/32 104/99 66/65 45/44 143/135 45/44 66/65 104/99 33/32 40/39 117/110 55/54 144/143 13/12 66/65 13/12 144/143 55/54 117/110 40/39. 12 notes have perfect fifths above them, giving you plenty of stable rooting points, but there are also quite a few tiny comma steps that blur into their neighbours, making this quite uneven and requiring a lot of work memorising what keys are mapped to what notes to play the correct combinations.
! 1-3-5-9-11-13_Eikosany.scl ! 1 3 5 9 11 13 3-combination Eikosany 20 ! 53.272 138.572 165.004 203.910 303.576 342.482 368.914 454.213 507.486 551.317 658.123 689.890 701.955 840.527 866.959 1005.531 1017.596 1049.362 1156.168 1200