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

A206507

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

Terms

    a(0) =3399a(1) =93405a(2) =2105607a(3) =41873838a(4) =769739571a(5) =13397007426a(6) =224125465767

External references