Number of (n+1)X4 binary arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors.
A187723
Number of (n+1)X4 binary arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors.
Terms
- a(0) =130a(1) =689a(2) =3698a(3) =20684a(4) =114633a(5) =641743a(6) =3588249a(7) =20085335a(8) =112408781a(9) =629194966a(10) =3521712900a(11) =19712026328a(12) =110333621076a(13) =617565943941
External references
- oeis: A187723