59151473070domain: NAppears in sequencesNumber of (n+1)X(n+1) 0..3 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards.at n=3A204302Number of (n+1)X5 0..3 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards.at n=3A204306