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 A229866 Number of n X n 0..2 arrays with corresponding row and column sums equal 0
 3, 27, 1215, 384183, 923742873, 17451302074317, 2658656027421822249 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A229870 LINKS EXAMPLE Some solutions for n=4 ..0..0..1..2....0..1..2..1....0..0..2..2....0..1..0..0....0..0..1..1 ..1..1..1..0....2..2..0..2....2..1..0..0....0..2..0..1....1..2..0..1 ..0..2..1..0....2..2..1..0....2..2..0..0....1..0..2..1....1..0..0..2 ..2..0..0..2....0..1..2..2....0..0..2..1....0..0..2..1....0..2..2..1 CROSSREFS Sequence in context: A009066 A279832 A012012 * A305843 A192341 A191511 Adjacent sequences:  A229863 A229864 A229865 * A229867 A229868 A229869 KEYWORD nonn AUTHOR R. H. Hardin, Oct 01 2013 STATUS approved

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Last modified July 26 20:56 EDT 2021. Contains 346300 sequences. (Running on oeis4.)