Leonard pairs having zero-diagonal TD-TD form

Fix an algebraically closed field $\mathbb{F}$ and an integer $n\ge 1$. Let ${\text{Mat}}_n(\mathbb{F})$ denote the $\mathbb{F}$-algebra consisting of the $n \times n$matricesthathaveallentriesin$$\mathbb{F}$$. We consider a pair of diagonalizable matrices in ${\text{Mat}}_n(\mathbb{F})$, each acting in an irreducible tridiagonal fashion on an eigenbasis for the other one. Such a pair is called a Leonard pair in ${\text{Mat}}_n(\mathbb{F})$. In the present paper, we find all Leonard pairs $A,A^{\ast }$ in ${\text{Mat}}_n(\mathbb{F})$ such that each of $A$ and $A^{\ast }$ is irreducible tridiagonal with all diagonal entries $0$. This solves a problem given by Paul Terwilliger.