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A162052 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 0
1, 2, 3, 8, 31, 188, 2150, 40946, 1490523, 95741796, 11466071450, 2488266955088, 1000177563819104, 739901172499913695, 1017435042973995016499 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
CROSSREFS
Sequence in context: A160586 A340935 A162074 * A082569 A340495 A084908
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 25 2009
STATUS
approved

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Last modified May 23 22:02 EDT 2024. Contains 372765 sequences. (Running on oeis4.)