12972796635domain: NAppears in sequencesNumber of (n+2)X3 0..2 arrays with 3X3 subblock sums nondecreasing rightwards and downwards.at n=5A186622T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with 3X3 subblock sums nondecreasing rightwards and downwards.at n=15A186625