T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock differing from each horizontal or vertical neighbor.

A205520

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock differing from each horizontal or vertical neighbor.

Terms

    a(0) =81a(1) =360a(2) =360a(3) =1683a(4) =2412a(5) =1683a(6) =7572a(7) =17166a(8) =17166a(9) =7572a(10) =35577a(11) =122232a(12) =205803a(13) =122232a(14) =35577a(15) =160218a(16) =864948a(17) =2343348a(18) =2343348a(19) =864948a(20) =160218a(21) =750426a(22) =6127554a(23) =27630789a(24) =44160240a(25) =27630789a(26) =6127554a(27) =750426a(28) =3387924a(29) =43434216

External references