%I A129894
%S A129894 1,2,4,26,35,821,1462,148176,221880,96574099,126381799,196582061878,
%T A129894 269726664738,1805524692669120,2273457768078921,66873306557904082902,
%U A129894 76981272132177635155,9380430300181898788236006
%N A129894 Number of ways of placing non-attacking knights on an n X n chessboard 
               symmetric under horizontal reflection.
%Y A129894 Sequence in context: A162126 A162118 A128774 this_sequence A028386 A155120 
               A144691
%Y A129894 Adjacent sequences: A129891 A129892 A129893 this_sequence A129895 A129896 
               A129897
%K A129894 nonn
%O A129894 0,2
%A A129894 Ron Hardin (rhhardin(AT)att.net), Aug 25 2008