Number of ways of placing kings with no more than 2 mutual attacks on an n X n chessboard symmetric under horizontal reflection.
A143876
Number of ways of placing kings with no more than 2 mutual attacks on an n X n chessboard symmetric under horizontal reflection.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =27a(4) =26a(5) =1119a(6) =921a(7) =122658a(8) =74887a(9) =43743593a(10) =18775998a(11) =43803694319a(12) =14699916393
External references
- oeis: A143876