Number of ways to place n nonattacking composite pieces queen + leaper[4,5] on an n X n chessboard.

A189872

Number of ways to place n nonattacking composite pieces queen + leaper[4,5] on an n X n chessboard.

Terms

    a(0) =1a(1) =0a(2) =0a(3) =2a(4) =10a(5) =4a(6) =12a(7) =32a(8) =96a(9) =144a(10) =576a(11) =2280a(12) =11988a(13) =47128a(14) =232756a(15) =1290772a(16) =7383588a(17) =46039788a(18) =311958088a(19) =2263575696a(20) =16975534432

External references