Number of (n+1)X9 binary arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces.

A186938

Number of (n+1)X9 binary arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces.

Terms

    a(0) =7528a(1) =431656a(2) =5769904a(3) =102475864a(4) =1627815216a(5) =28477050608a(6) =475637108896

External references