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A253036 Number of (n+2)X(n+2) 0..3 arrays with every consecutive three elements in every row, column, diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order 0
130, 540, 1750, 5860, 25601, 115438, 620736, 3167807, 17606301, 98882069, 733424153, 4422336009 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A253044

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Sequence in context: A253044 A253037 A281209 * A187723 A278658 A254924

Adjacent sequences:  A253033 A253034 A253035 * A253037 A253038 A253039

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 26 2014

STATUS

approved

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Last modified June 17 17:05 EDT 2021. Contains 345085 sequences. (Running on oeis4.)