A243281 - OEIS

%I #20 Jun 19 2014 20:59:12

%S 1,2,9,66,1244,32524,1114549,47513547,2401002993,140026612346

%N Number of inequivalent (mod D_8) ways to place n nonattacking knights on an n X n board.

%H <a href="/A243281/b243281.txt">Table of n, a(n) for n = 1..10</a>

%Y Cf. A201540, A243716.

%K nonn,hard

%O 1,2

%A _Heinrich Ludwig_, Jun 19 2014