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A162035
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
1
1, 1, 2, 5, 40, 305, 12691, 293917, 64666609, 4777061942, 5265804443700, 1328477888564856, 6827179524158309476, 6237767322227211160135, 140927471183914959653326558, 485894738692896067839001296906
OFFSET
1,3
LINKS
CROSSREFS
Sequence in context: A127974 A012801 A183910 * A366358 A245242 A004096
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 25 2009
STATUS
approved