Number of ways to place n nonattacking composite pieces rook + rider[2,6] on an n X n chessboard.
A189857
Number of ways to place n nonattacking composite pieces rook + rider[2,6] on an n X n chessboard.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =24a(4) =120a(5) =720a(6) =2952a(7) =16064a(8) =104800a(9) =816160a(10) =7327728a(11) =74031176a(12) =621684168a(13) =5950876288a(14) =64694543120a(15) =777746708096
External references
- oeis: A189857