Number of lattice paths from {n}^4 to {0}^4 using steps that decrement one component such that for each point (p_1,p_2,...,p_4) we have p_1<=p_2<=...<=p_4.

A227583

Number of lattice paths from {n}^4 to {0}^4 using steps that decrement one component such that for each point (p_1,p_2,...,p_4) we have p_1<=p_2<=...<=p_4.