Number of (n+1)X3 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock differing from each horizontal or vertical neighbor.

A205460

Number of (n+1)X3 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock differing from each horizontal or vertical neighbor.

Terms

    a(0) =2120a(1) =34792a(2) =597288a(3) =10306944a(4) =177411808a(5) =3053150968a(6) =52550629576a(7) =904498008200

External references