Number of ways to place n nonattacking composite pieces rook + rider[6,6] on an n X n chessboard.
A189842
Number of ways to place n nonattacking composite pieces rook + rider[6,6] on an n X n chessboard.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =24a(4) =120a(5) =720a(6) =4800a(7) =34752a(8) =280512a(9) =2528256a(10) =25282560a(11) =278323200a(12) =3242649600a(13) =40330371072a(14) =536528954880
External references
- oeis: A189842