  Greene-Jabuka and Lecuona confirmed the slice-ribbon conjecture for
3-stranded pretzel knots except for an infinite family
$P(a,-a-2,-\frac{(a+1)^2}{2})$ where $a$ is an odd integer greater than $1$.
Lecuona and Miller showed that $P(a,-a-2,-\frac{(a+1)^2}{2})$ are not slice
unless $a\equiv 1, 11, 37, 47, 59 \pmod{60}$. In this note, we show that
four-fifths of the remaining knots in the family are not slice.
