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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

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 February 23 21:20 EST 2020. Contains 332195 sequences. (Running on oeis4.)