Half the number of (n+1) X 2 0..3 arrays with every 2 X 2 subblock having two or four distinct clockwise edge differences.
A209906
Half the number of (n+1) X 2 0..3 arrays with every 2 X 2 subblock having two or four distinct clockwise edge differences.
Terms
- a(0) =62a(1) =562a(2) =5008a(3) =44770a(4) =399930a(5) =3573388a(6) =31926146a(7) =285247762a(8) =2548561164a(9) =22770302450a(10) =203442764450
External references
- oeis: A209906