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%I #5 Dec 18 2015 18:17:15
%S 2,4,21,330,14610,1820715,653629616,696496706166,2267861968974085,
%T 23151301116946350437,757490164568070202377310,
%U 80950840941871760357231324684
%N Number of n X n binary arrays with rows, considered as binary numbers, in strictly increasing order, and columns, considered as binary numbers, in nondecreasing order.
%H R. H. Hardin, <a href="/A151801/a151801.txt">Binary arrays with both rows and cols sorted, symmetries</a>
%K nonn
%O 1,1
%A _R. H. Hardin_ Jun 27 2009
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