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 A229688 Number of defective 3-colorings of an n X n 0..2 array connected horizontally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order 0
 0, 3, 626, 80757, 17724789, 7551515197, 6749642728251, 13137498602431137, 56959853494513069323, 558086310754870843057446, 12478933741531750768879884477, 641265228914623466199892311965220 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A229694 LINKS EXAMPLE Some solutions for n=3 ..0..1..2....0..1..0....0..1..0....0..1..0....0..1..2....0..0..1....0..1..0 ..0..2..0....2..2..1....1..2..1....0..2..2....2..0..0....0..2..0....1..0..1 ..1..2..2....0..0..1....2..0..2....0..2..1....0..1..0....1..2..1....1..0..2 CROSSREFS Sequence in context: A225761 A140029 A161964 * A287890 A091261 A332163 Adjacent sequences:  A229685 A229686 A229687 * A229689 A229690 A229691 KEYWORD nonn AUTHOR R. H. Hardin Sep 27 2013 STATUS approved

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Last modified September 21 03:45 EDT 2020. Contains 337266 sequences. (Running on oeis4.)