64354744

Appears in sequences

• 1/3 the number of n X n 0..2 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=4A185551
• 1/3 the number of nX5 0..2 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=4A185555
• T(n,k)=1/3 the number of nXk 0..2 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=40A185559