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 A188450 Number of (2*n)Xn binary arrays with nonzero rows in decreasing order, no more than 3 ones in any row and exactly 2 ones in every column 0
 0, 1, 8, 66, 722, 9955, 165252, 3221806, 72445292, 1851203574, 53113148720, 1694163830194, 59579694687012 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Row 2 of A188449 LINKS EXAMPLE Some solutions for 6X3 ..1..1..1....1..1..0....1..1..1....1..0..1....1..1..0....1..1..1....1..1..1 ..1..0..1....1..0..1....1..0..0....1..0..0....1..0..1....1..0..0....1..1..0 ..0..1..0....0..1..0....0..1..1....0..1..1....0..1..1....0..1..0....0..0..1 ..0..0..0....0..0..1....0..0..0....0..1..0....0..0..0....0..0..1....0..0..0 ..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0 ..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0 CROSSREFS Sequence in context: A152275 A083385 A275230 * A121766 A052620 A052669 Adjacent sequences:  A188447 A188448 A188449 * A188451 A188452 A188453 KEYWORD nonn AUTHOR R. H. Hardin Mar 31 2011 STATUS approved

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Last modified August 5 21:18 EDT 2020. Contains 336213 sequences. (Running on oeis4.)