Number of ways of placing kings with no more than 1 mutual attack on an n X n chessboard symmetric under horizontal reflection.
A143871
Number of ways of placing kings with no more than 1 mutual attack on an n X n chessboard symmetric under horizontal reflection.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =13a(4) =18a(5) =425a(6) =371a(7) =27872a(8) =25147a(9) =8144945a(10) =4679546a(11) =6097351181a(12) =3118820527
External references
- oeis: A143871