Number of ways to place 10n nonattacking kings on a 20 X 2n cylindrical chessboard.

A195654

Number of ways to place 10n nonattacking kings on a 20 X 2n cylindrical chessboard.

Terms

    a(0) =11264a(1) =48132a(2) =251126a(3) =1473764a(4) =9434784a(5) =64923594a(6) =476033636a(7) =3694894500a(8) =30179587994a(9) =257860425672

External references