Number of (n+1) X 2 0..3 arrays with the number of clockwise edge increases in every 2 X 2 subblock equal to the number of counterclockwise edge increases.

A208485

Number of (n+1) X 2 0..3 arrays with the number of clockwise edge increases in every 2 X 2 subblock equal to the number of counterclockwise edge increases.

Terms

    a(0) =152a(1) =1448a(2) =13800a(3) =131528a(4) =1253608a(5) =11948296a(6) =113880744a(7) =1085412040a(8) =10345202024a(9) =98601453704a(10) =939783162408

External references