Number of (n+1)X4 0..3 arrays with no 2X2 subblock trace equal to any horizontal or vertical neighbor 2X2 subblock trace.

A185927

Number of (n+1)X4 0..3 arrays with no 2X2 subblock trace equal to any horizontal or vertical neighbor 2X2 subblock trace.

Terms

    a(0) =45184a(1) =5113920a(2) =590014464a(3) =67954333216

External references