T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with 3X3 subblock sums nondecreasing rightwards and downwards.

A186625

T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with 3X3 subblock sums nondecreasing rightwards and downwards.

Terms

    a(0) =19683a(1) =317115a(2) =317115a(3) =5109075a(4) =9957573a(5) =5109075a(6) =82312875a(7) =313250283a(8) =313250283a(9) =82312875a(10) =1033357725a(11) =9626194591a(12) =19192412328a(13) =9626194591a(14) =1033357725a(15) =12972796635a(16) =205142945972

External references