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 one, and every 2X2 determinant nonzero.

A205926

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 one, and every 2X2 determinant nonzero.

Terms

    a(0) =76a(1) =389a(2) =389a(3) =1828a(4) =2684a(5) =1828a(6) =9144a(7) =15561a(8) =15561a(9) =9144a(10) =43572a(11) =104311a(12) =67372a(13) =104311a(14) =43572a(15) =215294a(16) =625713a(17) =583542a(18) =583542a(19) =625713a(20) =215294a(21) =1035724a(22) =4085161a(23) =2570656a(24) =7177505a(25) =2570656a(26) =4085161a(27) =1035724a(28) =5082472a(29) =25017018

External references