T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.

A238046

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.

Terms

    a(0) =81a(1) =340a(2) =340a(3) =1440a(4) =1944a(5) =1440a(6) =6064a(7) =10812a(8) =10812a(9) =6064a(10) =25948a(11) =61668a(12) =81524a(13) =61668a(14) =25948a(15) =109200a(16) =352180a(17) =621780a(18) =621780a(19) =352180a(20) =109200a(21) =466296a(22) =1999804a(23) =4837484a(24) =6698520a(25) =4837484a(26) =1999804a(27) =466296a(28) =1962720a(29) =11359816

External references