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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

Table of n, a(n) for n=1..12.

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.)