We give a generating series expression for the sum of all multiple zeta values of a fixed weight, depth, and height, which end with a given string = (₁, , ᵣ) ; this builds upon the proof of the Ohno-Zagier Theorem. In particular, the sum of all multiple zeta values of fixed weight, depth and ending with has bounded depth ₁ + + ᵣ. We give some applications to evaluations of interpolated multiple zeta values, and to the generating series of double zeta values.
Steven Charlton (Mon,) studied this question.