Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces.

A187132

Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces.

Terms

    a(0) =0a(1) =1773a(2) =267840a(3) =201302208a(4) =440941355208

External references