Sun's quadratic practical-values conjecture

Let $a,b,c$ be positive integers with $2 mid ab$ and $2 divides c$. A practical number is a positive integer each of whose integers from $1$ through it can be written as a \sum of distinct divisors. Sun's quadratic practical-values conjecture. There are infinitely many $n in\natural$ such that $an^2+bn+c$ is practical. Moreover, when $a=1$, there is an integer $n$ satisfying $1<n\leq\max\{b,c\}$ such that $n^2+bn+c$ is practical. The conjecture is motivated by computational evidence, and the source gives no resolution.