Half the number of (n+1)X3 0..3 arrays with every 2X2 subblock having two or four distinct clockwise edge differences.
A209907
Half the number of (n+1)X3 0..3 arrays with every 2X2 subblock having two or four distinct clockwise edge differences.
Terms
- a(0) =562a(1) =13098a(2) =295448a(3) =6711168a(4) =152153160a(5) =3452051294a(6) =78298719958
External references
- oeis: A209907