Number of (n+1) X (1+1) 0..3 arrays with each 2 X 2 subblock having the number of clockwise edge increases less than or equal to the number of counterclockwise edge increases.

A234789

Number of (n+1) X (1+1) 0..3 arrays with each 2 X 2 subblock having the number of clockwise edge increases less than or equal to the number of counterclockwise edge increases.

Terms

    a(0) =204a(1) =2504a(2) =30536a(3) =371976a(4) =4530424a(5) =55175944a(6) =671983416a(7) =8184025736a(8) =99672501944

External references