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A229631 Number of defective 3-colorings of an n X n 0..2 array connected horizontally, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order. 0
0, 6, 244, 10227, 960325, 170405645, 61836040854, 45634751291449, 69219300810586905, 216612095709360988933, 1408049695722118625807058, 18999842797533792961661827884 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A229637.

LINKS

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

EXAMPLE

Some solutions for n=3:

  0 0 1   0 1 2   0 1 0   0 1 2   0 1 0   0 0 1   0 1 2

  1 2 0   1 0 2   0 1 2   2 1 2   2 0 2   1 0 2   0 1 2

  1 2 1   2 0 2   0 1 1   0 2 0   2 0 1   1 0 1   2 1 1

CROSSREFS

Cf. A229637.

Sequence in context: A254009 A072228 A322559 * A206307 A229475 A281054

Adjacent sequences:  A229628 A229629 A229630 * A229632 A229633 A229634

KEYWORD

nonn

AUTHOR

R. H. Hardin, Sep 27 2013

STATUS

approved

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Last modified August 8 14:59 EDT 2022. Contains 356009 sequences. (Running on oeis4.)