T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having nonzero determinant and having the same number of clockwise edge increases as its horizontal and vertical neighbors.

A205768

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having nonzero determinant and having the same number of clockwise edge increases as its horizontal and vertical neighbors.

Terms

    a(0) =192a(1) =1262a(2) =1262a(3) =8659a(4) =17674a(5) =8659a(6) =62607a(7) =274013a(8) =274013a(9) =62607a(10) =462040a(11) =4570761a(12) =9909258a(13) =4570761a(14) =462040a(15) =3490700a(16) =77757894a(17) =375857889a(18) =375857889a(19) =77757894a(20) =3490700a(21) =26672819a(22) =1336717872a(23) =14312320196a(24) =31592825608a(25) =14312320196

External references