Half the number of (n+1) X 2 0..2 arrays with every 2 X 2 subblock having two or three distinct clockwise edge differences.
A210269
Half the number of (n+1) X 2 0..2 arrays with every 2 X 2 subblock having two or three distinct clockwise edge differences.
Terms
- a(0) =35a(1) =273a(2) =2130a(3) =16620a(4) =129684a(5) =1011912a(6) =7895856a(7) =61610640a(8) =480742176a(9) =3751187136a(10) =29270169408a(11) =228392449152
External references
- oeis: A210269