Half the number of (n+1)X3 0..3 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference.
A209781
Half the number of (n+1)X3 0..3 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference.
Terms
- a(0) =576a(1) =12492a(2) =266126a(3) =5719838a(4) =122871278a(5) =2641341716a(6) =56780957220
External references
- oeis: A209781