T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock having nonzero determinant and having the same number of clockwise edge increases as its horizontal and vertical neighbors.
A206128
T(n,k)=Number of (n+1)X(k+1) 0..2 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) =50a(1) =170a(2) =170a(3) =558a(4) =798a(5) =558a(6) =1906a(7) =3692a(8) =3692a(9) =1906a(10) =6386a(11) =18572a(12) =25340a(13) =18572a(14) =6386a(15) =21940a(16) =93582a(17) =201498a(18) =201498a(19) =93582a(20) =21940a(21) =74714a(22) =491162a(23) =1622095a(24) =2501248a(25) =1622095a(26) =491162a(27) =74714a(28) =258496a(29) =2591052
External references
- oeis: A206128