T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with the number of rightwards and downwards edge increases in each 2 X 2 subblock equal to the number in all its horizontal and vertical neighbors.

A205097

T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with the number of rightwards and downwards edge increases in each 2 X 2 subblock equal to the number in all its horizontal and vertical neighbors.

Terms

    a(0) =256a(1) =1328a(2) =1328a(3) =8176a(4) =13116a(5) =8176a(6) =55848a(7) =171790a(8) =171790a(9) =55848a(10) =401164a(11) =2323490a(12) =4251766a(13) =2323490a(14) =401164a(15) =2965056a(16) =33432873a(17) =124624799a(18) =124624799a(19) =33432873a(20) =2965056a(21) =22161076a(22) =473468278a(23) =3475452601a(24) =6997750028a(25) =3475452601a(26) =473468278

External references