108640

Appears in sequences

• Number of 4-step knight's tours on an (n+2) X (n+2) board summed over all starting positions.at n=17A186853
• Number of (n+2) X 6 0..3 arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock.at n=5A186876
• Number of (n+2)X8 0..3 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock.at n=3A186878
• a(n) = n*A052530(n)/2.at n=8A207836