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 differing from the number in each of its horizontal and vertical neighbors.
A205246
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 differing from the number in each of its horizontal and vertical neighbors.
Terms
- a(0) =81a(1) =486a(2) =486a(3) =2990a(4) =4158a(5) =2990a(6) =18148a(7) =36478a(8) =36478a(9) =18148a(10) =111041a(11) =323806a(12) =515162a(13) =323806a(14) =111041a(15) =677732a(16) =2873148a(17) =7051340a(18) =7051340a(19) =2873148a(20) =677732a(21) =4143102a(22) =25443411a(23) =97718448a(24) =144087952a(25) =97718448a(26) =25443411a(27) =4143102a(28) =25302238
External references
- oeis: A205246