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A229678 Number of defective 3-colorings of an n X n 0..2 array connected diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order 0
0, 2, 888, 186576, 58038768, 33555543408, 39647663129952, 100358466494032656, 559874175467657854896, 7007180500895781669589584 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A229685

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=3

..0..0..0....0..1..1....0..1..0....0..1..0....0..1..1....0..0..1....0..0..1

..1..0..1....0..2..2....2..2..1....2..2..1....0..0..1....1..1..1....2..0..1

..1..2..2....2..1..2....2..0..1....0..1..1....2..2..2....1..2..2....2..2..1

CROSSREFS

Sequence in context: A239149 A050247 A159705 * A261528 A265881 A203609

Adjacent sequences:  A229675 A229676 A229677 * A229679 A229680 A229681

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 27 2013

STATUS

approved

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Last modified August 9 18:32 EDT 2020. Contains 336326 sequences. (Running on oeis4.)