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%I #4 Mar 31 2012 12:35:06
%S 1,10,250,22946,8222576,11168045764,57451983566596,
%T 1121231537486377866,82999668877677132763564,
%U 23304040481827726137141908956,24817820869161647380317564563160782
%N Number of n X n binary matrices with every 1 adjacent to another 1 horizontally or vertically.
%K nonn
%O 1,2
%A _R. H. Hardin_, Jan 14 2008
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