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 A183408 Number of n X n binary arrays with each sum of a(1..i,1..j) no greater than i*j/2 and rows and columns in nondecreasing order 0
 1, 5, 22, 380, 11499, 1497764, 408834576, 475512062908 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A183413 LINKS EXAMPLE Some solutions for 4X4 ..0..0..1..1....0..0..0..1....0..0..0..1....0..0..0..0....0..0..0..0 ..0..1..0..0....0..0..0..1....0..0..1..0....0..0..0..0....0..0..1..1 ..0..1..0..0....0..0..0..1....0..1..1..0....0..1..1..1....0..0..1..1 ..1..1..0..0....0..0..1..1....1..0..1..0....1..0..0..0....0..1..1..1 CROSSREFS Sequence in context: A066865 A183902 A005632 * A298322 A299215 A300031 Adjacent sequences:  A183405 A183406 A183407 * A183409 A183410 A183411 KEYWORD nonn AUTHOR R. H. Hardin Jan 04 2011 STATUS approved

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Last modified May 24 23:45 EDT 2020. Contains 334581 sequences. (Running on oeis4.)