  Building upon a recent formula for $(3,m)$-Catalan polynomials, we describe a
formula for $(3,m)$-Hikita polynomials in terms related to Catalan polynomials.
This formula shows a surprising relation among coefficients of Hikita
polynomials and implies deeper recursive relations and proves the
$q,t$-symmetry of $(3,m)$-Hikita polynomials.
