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A162052
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Number of n X n symmetric binary arrays with rows, considered as binary numbers, in nondecreasing order, and an even number of ones in each row
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0
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1, 2, 3, 8, 31, 188, 2150, 40946, 1490523, 95741796, 11466071450, 2488266955088, 1000177563819104, 739901172499913695, 1017435042973995016499
(list;
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refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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