Number of ways to place n nonattacking composite pieces rook + rider[3,6] on an n X n chessboard.
A189860
Number of ways to place n nonattacking composite pieces rook + rider[3,6] on an n X n chessboard.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =24a(4) =120a(5) =720a(6) =3312a(7) =18688a(8) =127104a(9) =990208a(10) =8878016a(11) =89267712a(12) =789509184a(13) =7803741824a(14) =85447337472
External references
- oeis: A189860