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%I #5 Mar 31 2012 12:36:08
%S 16,264,10776,1011136,229028648,121525356464,153323988561520,
%T 455805504397977992,3209063463825423259232,53344074954377463462263136,
%U 2097212449015058409197692938608
%N Number of (n+1)X(n+1) 0..1 arrays with the array of 2X2 subblock determinants symmetric
%C Column 1 of A187457
%e Some solutions for 4X4
%e ..0..0..1..1....1..0..1..0....0..1..1..0....1..0..1..1....1..1..1..1
%e ..1..0..1..1....0..0..1..1....0..1..0..0....1..0..0..1....0..0..0..0
%e ..0..0..1..0....1..0..1..0....1..0..1..0....1..0..1..0....0..0..0..1
%e ..1..1..0..1....0..1..0..0....0..0..1..0....0..1..0..0....0..0..1..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 10 2011
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