Number of (n+1) X (n+1) binary arrays with every 2 X 2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2 X 2 subblock traces.

A186931

Number of (n+1) X (n+1) binary arrays with every 2 X 2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2 X 2 subblock traces.

Terms

    a(0) =0a(1) =104a(2) =1840a(3) =59720a(4) =3026432a(5) =264604776a(6) =35582947920

External references