  We calculate the holographic three-point function parameters $\mathcal A$,
$\mathcal B$, $\mathcal C$ in general $d\geqslant 4$ dimensions from higher
curvature gravities up to and including the quartic order. The result is valid
both for massless and perturbative higher curvature gravities. It is known that
in four dimensional CFT the $a$-charge is a linear combination of $\mathcal A$,
$\mathcal B$, $\mathcal C$, our result reproduces this but also shows that a
similar relation does not exist for general $d > 4$. We then compute the Weyl
anomaly in $d = 6$ and found all the three $c$-charges are linear combinations
of $\mathcal A$, $\mathcal B$, $\mathcal C$, which is consistent with that the
$a$-charge is not. We also find the previously conjectured relation between
$t_2$, $t_4$, $h''$ does not hold in general massless gravities, but holds for
quasi-topological ones, and we obtain the missing coefficient.

High Energy Physics - Theory;General Relativity and Quantum Cosmology