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A205244 Number of (n+1)X7 0..2 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock differing from the number in each of its horizontal and vertical neighbors 0
677732, 25443411, 1334713506, 60907844595, 3053080325738, 145542216126349, 7109556887269900, 344112922016013626, 16763097381054518808 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A205246

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A257360 A251884 A237005 * A119404 A014886 A253868

Adjacent sequences:  A205241 A205242 A205243 * A205245 A205246 A205247

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 24 2012

STATUS

approved

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Last modified July 29 17:41 EDT 2021. Contains 346346 sequences. (Running on oeis4.)