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%I #4 Mar 31 2012 12:35:06
%S 1,2,4,10,21,89,248,1652,5760,59789,268529,4367552,24922412,641484896,
%T 4607113999,188770443286,1702258930069,111575238563044,
%U 1256539208451845,132483845142611245,1854392449274745630,316017552098202250347
%N Number of ways of placing non-attacking knights on an n X n chessboard symmetric about both diagonal and antidiagonal.
%K nonn
%O 0,2
%A _R. H. Hardin_, Aug 25 2008
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