  We study the algebraic properties of Generalized Laguerre polynomials for
negative integral values of a given parameter which is $L_{n}^{(-1-n-r)}(x)=
\sum\limits_{j=0}^{n} \binom{n-j+r}{n-j} \frac{x^{j}}{j!}$ for integers $r\geq
0, n\geq 1$. For different values of parameter $r$, this family provides
polynomials which are of great interest. Hajir conjectured that for integers
$r\geq 0$ and $n\geq 1$, $L_{n}^{(-1-n-r)}(x)$ is an irreducible polynomial
whose Galois group contains $A_n$, the alternating group on $n$ symbols.
Extending earlier results of Schur, Hajir, Sell, Nair and Shorey, we confirm
this conjecture for all $r\leq 60$. We also prove that $L_{n}^{(-1-n-r)}(x)$ is
an irreducible polynomial whose Galois group contains $A_n$ whenever
$n>e^{r\left(1+\frac{1.2762}{{\rm log } r}\right)}$.
