Number of ways of placing non-attacking knights on an n X n chessboard symmetric under 180 degree rotation.
A131180
Number of ways of placing non-attacking knights on an n X n chessboard symmetric under 180 degree rotation.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =14a(4) =53a(5) =313a(6) =2170a(7) =31896a(8) =387802a(9) =11507269a(10) =290487893a(11) =15905409672a(12) =816544187208
External references
- oeis: A131180