T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock equal to two, and every 2X2 determinant nonzero.

A206318

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock equal to two, and every 2X2 determinant nonzero.

Terms

    a(0) =112a(1) =873a(2) =873a(3) =6831a(4) =14990a(5) =6831a(6) =53463a(7) =258452a(8) =258452a(9) =53463a(10) =418468a(11) =4466450a(12) =9841886a(13) =4466450a(14) =418468a(15) =3275406a(16) =77132181a(17) =375274347a(18) =375274347a(19) =77132181a(20) =3275406a(21) =25637095a(22) =1332632711a(23) =14309749540a(24) =31585648103a(25) =14309749540

External references