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%I #5 Mar 31 2012 12:34:59
%S 2,16,378,30824,8402216,7664347268,23371379782671,238225926162821893,
%T 8118262028301675826132,924887563235974860108746534,
%U 352261845112790535941917078458268
%N Number of n X n binary matrices with each 1 having at most 2 adjacent 1's.
%Y No adjacent 1's A006506, one adjacent 1 A067968.
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 10 2002
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