581588614domain: NAppears in sequencesNumber of n X 3 0..3 arrays with rows and columns in nondecreasing order.at n=6A184123Number of n X 7 0..3 arrays with rows and columns in nondecreasing order.at n=2A184127T(n,k)=Number of nXk 0..3 arrays with rows and columns in nondecreasing order.at n=38A184129