Number of (n+1)X(n+1) 0..3 arrays with every 2X3 or 3X2 subblock having exactly two equal edges, and new values 0..3 introduced in row major order.

A206230

Number of (n+1)X(n+1) 0..3 arrays with every 2X3 or 3X2 subblock having exactly two equal edges, and new values 0..3 introduced in row major order.

Terms

    a(0) =15a(1) =256a(2) =4456a(3) =283728a(4) =10915392a(5) =1448239080a(6) =649065145152

External references