Todo: add definition, add introduction

What is known as "father" has a large 3:2 which warps the heptatonic scale to an octatonic.

← 12ed5 13ed5 14ed5 →
Prime factorization 13 (prime)
Step size 214.332 ¢ 
Octave 6\13ed5 (1285.99 ¢)
Twelfth 9\13ed5 (1928.99 ¢)
(semiconvergent)
Consistency limit 3
Distinct consistency limit 3

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.