T(n,k) = number of (n+1) X (k+1) 0..2 arrays with every 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and the same number of counterclockwise edge increases as its vertical neighbors.

A205917

T(n,k) = number of (n+1) X (k+1) 0..2 arrays with every 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and the same number of counterclockwise edge increases as its vertical neighbors.

Terms

    a(0) =81a(1) =369a(2) =369a(3) =1764a(4) =1791a(5) =1764a(6) =8655a(7) =9831a(8) =9831a(9) =8655a(10) =43155a(11) =60108a(12) =87918a(13) =60108a(14) =43155a(15) =218034a(16) =387267a(17) =875760a(18) =875760a(19) =387267a(20) =218034a(21) =1112664a(22) =2554848a(23) =8986929a(24) =14150391a(25) =8986929a(26) =2554848a(27) =1112664a(28) =5722236a(29) =17051166

External references