Number of non-isomorphic ways to attack all squares on an n X n chessboard using the smallest possible number of queens with each queen attacking at least one other.
A002565
Number of non-isomorphic ways to attack all squares on an n X n chessboard using the smallest possible number of queens with each queen attacking at least one other.
Terms
- a(0) =0a(1) =2a(2) =5a(3) =3a(4) =15a(5) =150a(6) =5a(7) =56a(8) =3a(9) =39a(10) =681
External references
- oeis: A002565