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A162035
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Number of n X n binary arrays with rows and columns, considered as binary numbers, in nondecreasing order, and all main diagonal and antidiagonal elements zero
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1
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1, 1, 2, 5, 40, 305, 12691, 293917, 64666609, 4777061942, 5265804443700, 1328477888564856, 6827179524158309476, 6237767322227211160135, 140927471183914959653326558, 485894738692896067839001296906
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listen;
history;
text;
internal format)
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OFFSET
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1,3
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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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