Number of ways to place 2 non-attacking kings in each row and column of an n X n board.
A389766
Number of ways to place 2 non-attacking kings in each row and column of an n X n board.
Terms
- a(0) =2a(1) =664a(2) =146510a(3) =31197434a(4) =6798881226
External references
- oeis: A389766