T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with nondecreasing medians of every three consecutive values in every row and column.

A250507

T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with nondecreasing medians of every three consecutive values in every row and column.

Terms

    a(0) =19683a(1) =300763a(2) =300763a(3) =4251528a(4) =9777655a(5) =4251528a(6) =59776471a(7) =289735900a(8) =289735900a(9) =59776471a(10) =729000000a(11) =8566581775a(12) =17751271450a(13) =8566581775a(14) =729000000a(15) =8316073576a(16) =211068335312

External references