A 15-odd-limit dekany. This creates a scale of 1 33/32 11/10 9/8 99/80 11/8 3/2 27/16 9/5 15/8 2/1, with steps of 33/32 16/15 45/44 11/10 10/9 12/11 9/8 16/15 25/24 16/15. With a good mix of familiar 5-limit chords on one side and more xenharmonic undecimal ones on the other, this shows strong compositional potential, like many of the dekanies derrived from the 1-5-9-15 hexany.

Circle diagram.
! 1-5-9-11-15_Dekany.scl
!
1 5 9 11 15 2-combination Dekany
10
!
53.272
165.004
203.910
368.914
551.317
701.955
905.865
1017.596
1088.268
1200

Suggested keyboard mapping: Start on C, skipping the F# and Ab notes.