A229678 - OEIS

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, 2, 888, 186576, 58038768, 33555543408, 39647663129952, 100358466494032656, 559874175467657854896, 7007180500895781669589584

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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,more

AUTHOR

R. H. Hardin, Sep 27 2013

STATUS

approved