The stable defective Kreweras number formula

Let $m,d,n$ be nonnegative integers, and let $4\lambda\vdash m$ be a partition of $m$ of length $k$. For each $i$, let $4\mu_i(\lambda)$ be the number of parts of $4\lambda$ of size $i$. For $n\geq d+m-1$, the defective Kreweras number conjecture.

$$\mathrm{Krew}_{d,n}(\lambda)=\frac{m+dk}{m+d}\frac{1}{m+d+1}{m+d+1\choose m+d+1-k,\mu_1(\lambda),\mu_2(\lambda),\ldots,\mu_m(\lambda)}.$$

This conjectured formula is a stable-range analogue of the formula for the ordinary Kreweras numbers. The supplied text gives no evidence that the conjecture has been proved or disproved, so its status remains open.