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A231443 Number of (n+1)X(n+1) 0..3 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with values 0..3 introduced in row major order 0
2, 15, 340, 33659, 9796477, 9081622778, 23670993512633, 180549324060008725, 3898800271416067773477 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A231451

LINKS

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

EXAMPLE

Some solutions for n=4

..0..0..1..1..1....0..0..0..0..0....0..0..0..0..0....0..0..1..1..1

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

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

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

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

CROSSREFS

Sequence in context: A030642 A297077 A175563 * A068391 A215743 A254224

Adjacent sequences:  A231440 A231441 A231442 * A231444 A231445 A231446

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 09 2013

STATUS

approved

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Last modified September 24 07:28 EDT 2020. Contains 337317 sequences. (Running on oeis4.)