  Let $\tau$ be the substitution $1\to 101$ and $0\to 1$ on the alphabet
$\{0,1\}$. The fixed point of $\tau$ leading by 1, denoted by $\mathbf{s}$, is
a Sturmian sequence. We first give a characterization of $\mathbf{s}$ using
$f$-representation. Then we show that the distribution of zeros in the
determinants induces a partition of integer lattices in the first quadrant.
Combining those properties, we give the explicit values of the Hankel
determinants $H_{m,n}$ of $\mathbf{s}$ for all $m\ge 0$ and $n\ge 1$.
