Half the number of (n+1)X3 0..2 arrays with every 2X2 subblock having two or three distinct clockwise edge differences.
A210270
Half the number of (n+1)X3 0..2 arrays with every 2X2 subblock having two or three distinct clockwise edge differences.
Terms
- a(0) =273a(1) =5558a(2) =113248a(3) =2307956a(4) =47036870a(5) =958632858a(6) =19537398722a(7) =398181683100
External references
- oeis: A210270