Number of (n+1)X5 0..3 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards.

A204306

Number of (n+1)X5 0..3 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards.

Terms

    a(0) =162000a(1) =15057392a(2) =1271789125a(3) =59151473070

External references