Half the number of (n+1)X5 0..3 arrays with every 2X2 subblock having two or four distinct clockwise edge differences.
A209909
Half the number of (n+1)X5 0..3 arrays with every 2X2 subblock having two or four distinct clockwise edge differences.
Terms
- a(0) =44770a(1) =6711168a(2) =948609890a(3) =135833193008
External references
- oeis: A209909