Number of ways to place n nonattacking composite pieces rook + rider[4,6] on an n X n chessboard.

A189862

Number of ways to place n nonattacking composite pieces rook + rider[4,6] on an n X n chessboard.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =24a(4) =120a(5) =720a(6) =3720a(7) =22336a(8) =153796a(9) =1213344a(10) =10849504a(11) =108891704a(12) =1023690268a(13) =10593791168a(14) =119694887008

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