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

A204302

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

Terms

    a(0) =256a(1) =51680a(2) =47834122a(3) =59151473070

External references