Number of (n+1) X 3 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly two counterclockwise and two clockwise edge increases.

A206112

Number of (n+1) X 3 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly two counterclockwise and two clockwise edge increases.

Terms

    a(0) =1140a(1) =5228a(2) =22624a(3) =111552a(4) =588840a(5) =3048096a(6) =16072760a(7) =84203240a(8) =442219464a(9) =2322616208a(10) =12190484896a(11) =64028249688a(12) =336134793648

External references