Number of self-avoiding closed paths on an n X n grid which pass through four corners ((0,0), (0,n-1), (n-1,n-1), (n-1,0)).

A333466

Number of self-avoiding closed paths on an n X n grid which pass through four corners ((0,0), (0,n-1), (n-1,n-1), (n-1,0)).

Terms

    a(0) =1a(1) =1a(2) =11a(3) =373a(4) =44930a(5) =17720400a(6) =22013629316

External references