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 A188388 Number of (n^2) X n binary arrays with rows in nonincreasing order and n ones in every column. 1
 1, 3, 39, 4079, 5442547, 135029200594, 85864898797026630, 1831628658711424019558504, 1644974303630818355119787542346815, 75615488905118998567211473141942014485626339 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS EXAMPLE All solutions for 4X2 ..1..1....1..0....1..1 ..1..1....1..0....1..0 ..0..0....0..1....0..1 ..0..0....0..1....0..0 MATHEMATICA A188392 = Cases[Import["https://oeis.org/A188392/b188392.txt", "Table"], {_, _}][[All, 2]]; a[n_] := A188392[[2 n^2 - 2 n + 1]]; Table[a[n], {n, 1, 10}] (* Jean-François Alcover, Sep 23 2019 *) CROSSREFS Main diagonal of A188392. Sequence in context: A342178 A342166 A188410 * A076628 A198411 A097421 Adjacent sequences:  A188385 A188386 A188387 * A188389 A188390 A188391 KEYWORD nonn AUTHOR R. H. Hardin, Mar 30 2011 EXTENSIONS More terms from Jean-François Alcover, Sep 23 2019 STATUS approved

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Last modified May 15 20:00 EDT 2021. Contains 343920 sequences. (Running on oeis4.)