Number of inequivalent placements of n nonattacking rooks on n X n board up to rotations of the board.
A263685
Number of inequivalent placements of n nonattacking rooks on n X n board up to rotations of the board.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =9a(4) =33a(5) =192a(6) =1272a(7) =10182a(8) =90822a(9) =908160a(10) =9980160a(11) =119761980a(12) =1556766780a(13) =21794734080a(14) =326918753280
External references
- oeis: A263685