Number of nX4 0..1 arrays with no 1 equal to more than two of its horizontal and vertical neighbors, with the exception of exactly two elements.

A283228

Number of nX4 0..1 arrays with no 1 equal to more than two of its horizontal and vertical neighbors, with the exception of exactly two elements.

Terms

    a(0) =0a(1) =6a(2) =395a(3) =8592a(4) =163860a(5) =2875836a(6) =47531178a(7) =753320466a(8) =11573758019a(9) =173540942990

External references