Number of binary arrangements on n X n array without adjacent three 1's.

A067968

Number of binary arrangements on n X n array without adjacent three 1's.

Terms

    a(0) =1a(1) =2a(2) =11a(3) =163a(4) =6547a(5) =720417a(6) =216173426a(7) =177509416175

External references