Belbachir et al.'s ray-unimodality conjecture for Pascal's triangle

Let $\binom{n}{k}$ be a fixed element of Pascal's triangle, and let a ray cross a sequence of entries in the triangle. Ray-unimodality conjecture. The sequence of binomial coefficients located along this ray is unimodal. This conjecture extends known unimodality results for several families of binomial coefficient sequences, but its resolution is not indicated here.