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%I #11 Sep 12 2015 11:00:29
%S 1,4,6,86,854,9556,146168,2660326,56083228,1349544632,36786865968,
%T 1117327217782
%N Number of ways to place n nonattacking princesses on an n X n board.
%C A princess moves like a bishop and a knight.
%H V. Kotesovec, <a href="https://oeis.org/wiki/User:Vaclav_Kotesovec">Non-attacking chess pieces</a>, 6ed, 2013, p. 744.
%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Fairy_chess_piece">Fairy chess piece</a>
%Y Cf. A201513, A000170, A002465, A201540.
%Y Cf. A185085, A051223, A244284, A201511, A201861, A137774.
%Y Cf. A225555.
%K nonn,hard,more
%O 1,2
%A _Vaclav Kotesovec_, Sep 16 2014
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