1970169608

Appears in sequences

• Number of n X n 0..3 arrays avoiding the pattern z+1 z+1 z horizontally and z-1 z-1 z vertically.at n=3A207576
• Number of nX4 0..3 arrays avoiding the pattern z+1 z+1 z horizontally and z-1 z-1 z vertically.at n=3A207578
• T(n,k)=Number of nXk 0..3 arrays avoiding the pattern z+1 z+1 z horizontally and z-1 z-1 z vertically.at n=24A207582