|
| |
|
|
A143879
|
|
Number of ways of placing kings with no more than 2 mutual attacks on an n X n chessboard symmetric about both diagonal and antidiagonal.
|
|
0
| |
|
|
1, 2, 3, 7, 12, 41, 85, 434, 1009, 7325, 21498, 219307, 803859, 11370922
(list; graph; refs; listen; history; internal format)
|
| |
| |
|
|
