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A205346 Number of (n+1)X(n+1) 0..3 arrays with no 2X2 subblock having the same number of equal edges as its horizontal or vertical neighbors, and new values 0..3 introduced in row major order 0
15, 1750, 1080457, 2423004172, 21200252524407 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A205352

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for n=4

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

..3..0..2..3..3....0..0..2..3..3....2..0..0..0..2....3..0..0..1..0

..0..2..2..0..0....1..2..0..3..0....0..3..3..1..3....2..0..0..1..3

..0..0..3..2..1....0..1..0..3..1....1..3..3..1..0....3..2..1..3..3

..0..0..3..0..2....2..1..0..2..3....3..0..1..0..0....3..0..2..3..3

CROSSREFS

Sequence in context: A195521 A122184 A069450 * A208868 A070862 A077730

Adjacent sequences:  A205343 A205344 A205345 * A205347 A205348 A205349

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 26 2012

STATUS

approved

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Last modified December 2 20:25 EST 2021. Contains 349445 sequences. (Running on oeis4.)