13943772

Appears in sequences

• Number of n X n 0..2n-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.at n=3A265450
• Number of nX4 0..n+4-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.at n=3A265454
• T(n,k)=Number of nXk 0..n+k-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.at n=24A265458