%I #6 Sep 12 2015 11:00:27
%S 1,4,6,84,120,784,280,40816,13806,1361706,110990,142633176,4263454,
%T 197730660,9246172320
%N Number of ways to place n nonattacking nightriders on an n X n cylindrical board
%H V. Kotesovec, <a href="https://oeis.org/wiki/User:Vaclav_Kotesovec">Non-attacking chess pieces</a>
%Y Cf. A190393, A196810, A196811, A172141, A173429
%K nonn,hard
%O 1,2
%A _Vaclav Kotesovec_, Oct 06 2011
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