27/13 |0 3 0 0 0 -1>
1265.3373 cents
https://en.xen.wiki/w/File:Jid_27_13_pluck_adu_dr220.mp3 sound sample
This interval, slightly larger than an octave, tritave inverse of 13/9, is notable for being well approximated by 10 steps of 15ed3 (1267.97 cents).