Half the number of (n+1) X 4 0..2 arrays with every 2 X 2 subblock having two or four distinct clockwise edge differences.
A209506
Half the number of (n+1) X 4 0..2 arrays with every 2 X 2 subblock having two or four distinct clockwise edge differences.
Terms
- a(0) =81a(1) =561a(2) =3906a(3) =27225a(4) =189801a(5) =1323270a(6) =9225765a(7) =64321641a(8) =448447914a(9) =3126561201a(10) =21798261945a(11) =151976626974
External references
- oeis: A209506