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A162030 Number of n X n symmetric binary arrays with rows, considered as binary numbers, in nondecreasing order, and all but the outermost 4 rows or columns zero 1
9471845, 370995866, 12256154479, 374124492162, 10495488465847, 271028317656933, 6466996667053452, 143211168475701734, 2956378703615485863, 57132980396982387053, 1037683143643901254026, 17777210671425885378565 (list; graph; refs; listen; history; text; internal format)
OFFSET
8,1
LINKS
CROSSREFS
Sequence in context: A274042 A066703 A270994 * A184570 A124515 A075009
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 25 2009
STATUS
approved

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Last modified July 12 10:18 EDT 2024. Contains 374244 sequences. (Running on oeis4.)