  Harmonic polynomials of type A are polynomials annihilated by the Dunkl
Laplacian associated to the symmetric group acting as a reflection group on
$\mathbb{R}^{N}$. The Dunkl operators are denoted by $T_{j}$ for $1\leq j\leq
N$, and the Laplacian $\Delta_{\kappa}=\sum_{j=1}^{N}T_{j}^{2}$. This paper
finds the homogeneous harmonic polynomials annihilated by all $T_{j}$ for
$j>2$. The structure constants with respect to the Gaussian and sphere inner
products are computed. These harmonic polynomials are used to produce monogenic
polynomials, those annihilated by a Dirac-type operator.
