How to solve this in least steps $\sum_{r=0}^{2014} \sum_{k=0}^r (-1)^k (k+1)(k+2)\binom{2019}{r-k}$

396 Views Asked by At

Find the remainder when

$$\sum_{r=0}^{2014} \sum_{k=0}^r (-1)^k (k+1)(k+2)\binom{2019}{r-k} $$ is divided by 64.