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Number of n X n symmetric binary arrays with rows, considered as binary numbers, in strictly increasing order, and no more than 5 ones in any row
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%I #4 Dec 18 2015 18:17:22

%S 2,3,9,48,438,6377,126669,3292900,104320191,3946694150,175609255247,

%T 9053540315118,533880519494913

%N Number of n X n symmetric binary arrays with rows, considered as binary numbers, in strictly increasing order, and no more than 5 ones in any row

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 25 2009