Number of ways of placing kings with no more than 1 mutual attack on an n X n chessboard symmetric under 180 degree rotation.
A143874
Number of ways of placing kings with no more than 1 mutual attack on an n X n chessboard symmetric under 180 degree rotation.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =7a(4) =18a(5) =111a(6) =497a(7) =4630a(8) =38327a(9) =702227a(10) =10398834
External references
- oeis: A143874