1459711domain: NAppears in sequencesNumber of (n+1)X(2+1) 0..3 arrays with row and column sums nondecreasing, and no adjacent elements equal.at n=6A233029T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with row and column sums nondecreasing, and no adjacent elements equal.at n=29A233031