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A230475 Number of 7Xn 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero 0
0, 386, 2647098, 3045192312, 2412390974650, 2147475302085202, 1929668277796729476, 1740277427965068258778, 1566684273436028817518446 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 7 of A230469

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=3

..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0

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

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

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

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

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

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

CROSSREFS

Sequence in context: A277988 A224496 A230274 * A116329 A273383 A038659

Adjacent sequences:  A230472 A230473 A230474 * A230476 A230477 A230478

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 20 2013

STATUS

approved

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Last modified August 19 10:54 EDT 2022. Contains 356228 sequences. (Running on oeis4.)