Number of (n+1) X 4 0..2 arrays with the number of clockwise edge increases in 2 X 2 subblocks nondecreasing, and counterclockwise edge increases nonincreasing, rightwards and downwards.

A206537

Number of (n+1) X 4 0..2 arrays with the number of clockwise edge increases in 2 X 2 subblocks nondecreasing, and counterclockwise edge increases nonincreasing, rightwards and downwards.

Terms

    a(0) =1620a(1) =14781a(2) =141759a(3) =1419921a(4) =14528199a(5) =150387285a(6) =1567749888a(7) =16417626507a(8) =172416155157

External references