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%I #4 Mar 31 2012 12:35:07
%S 1,2,16,466,51512,21425198,32840182186,188637643581570,
%T 4048457379398984078,323937479341259299455434,
%U 96758393657902322435446080112
%N Number of n X n binary matrices containing no more than six 1s in any 3 X 3 sub-block.
%Y Cf. A139810.
%K nonn
%O 0,2
%A _R. H. Hardin_, May 27 2008
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