13ed5
What is known as "father" has a large 3:2 which warps the heptatonic scale to an octatonic.
| ← 12ed5 | 13ed5 | 14ed5 → |
(semiconvergent)
Analogously, in hyperpyth, 13ed5 has an analogously large "13/5” which warps the scale similarly. It is not readily apparent what consonance(s) it approximates, but listeners have noted the sound to be enjoyable.
18ed5 also does this; the "13/5" is actually 50 cents sharp, while 8/3 is much closer.