Number of n X n binary matrices with every 1 adjacent to some 0 and every 0 adjacent to some 1, horizontally or vertically.

A133792

Number of n X n binary matrices with every 1 adjacent to some 0 and every 0 adjacent to some 1, horizontally or vertically.

Terms

    a(0) =6a(1) =126a(2) =8950a(3) =2308238a(4) =2129167114

External references