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

A186840

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

Terms

    a(0) =512a(1) =2688a(2) =2688a(3) =14112a(4) =19904a(5) =14112a(6) =74088a(7) =147428a(8) =147428a(9) =74088a(10) =324576a(11) =1075071a(12) =1537476a(13) =1075071a(14) =324576a(15) =1421952a(16) =6019798a(17) =15478835a(18) =15478835a(19) =6019798a(20) =1421952a(21) =6229504a(22) =33731024a(23) =111211414a(24) =209888936a(25) =111211414a(26) =33731024

External references