T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock equal to the number in all its horizontal and vertical neighbors.

A205055

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock equal to the number in all its horizontal and vertical neighbors.

Terms

    a(0) =81a(1) =243a(2) =243a(3) =803a(4) =889a(5) =803a(6) =2892a(7) =4171a(8) =4171a(9) =2892a(10) =10948a(11) =19151a(12) =23720a(13) =19151a(14) =10948a(15) =43261a(16) =100761a(17) =182720a(18) =182720a(19) =100761a(20) =43261a(21) =174282a(22) =515720a(23) =1280452a(24) =1887956a(25) =1280452a(26) =515720a(27) =174282a(28) =709813a(29) =2789316

External references