Number of (n+1) X 4 0..3 arrays with every 2 X 3 or 3 X 2 subblock having an equal number of clockwise and counterclockwise edge increases.

A206747

Number of (n+1) X 4 0..3 arrays with every 2 X 3 or 3 X 2 subblock having an equal number of clockwise and counterclockwise edge increases.

Terms

    a(0) =15680a(1) =793152a(2) =43894936a(3) =2475217568a(4) =140074119984

External references