1597074

Appears in sequences

• T(n,k) = Number of (n+2) X (k+2) 0..4 arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock.at n=21A186579
• T(n,k) = Number of (n+2) X (k+2) 0..4 arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock.at n=27A186579