Jordan canonical form of a specific $n\times n$ matrix

Question

Let $A=(a_{ij})$ be a $n\times n$ matrix with entries $a_{ij}$ satisfy $a_{ij}=1$ only if $i+j=n$ or $n+1$; for other $i,j$, $a_{ij}=0$. How can we compute its Jordan canonical form? Thank you.