444495768domain: NAppears in sequencesNumber of (n+1) X (3+1) 0..3 arrays with 2 X 2 subblock sum of squares lexicographically nondecreasing rowwise and columnwise.at n=2A235651T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with 2X2 subblock sum of squares lexicographically nondecreasing rowwise and columnwise.at n=12A235652