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A252906 Number of (n+2)X(2+2) 0..3 arrays with every consecutive three elements in every row and column having exactly 2 distinct values, in every diagonal 1 or 2 distinct values, in every antidiagonal 2 or 3 distinct values, and new values 0 upwards introduced in row major order 1
1125, 6699, 42647, 288263, 1984711, 13720545, 95366448, 664294791, 4628430243, 32278030363, 225170352448, 1570680525096, 10958602605331, 76461093301994, 533470122592798, 3722231877540721, 25971571135506891, 181212232746263516 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A252910

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=2

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

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

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

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

CROSSREFS

Sequence in context: A069984 A104285 A260898 * A203830 A252299 A203063

Adjacent sequences:  A252903 A252904 A252905 * A252907 A252908 A252909

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 24 2014

STATUS

approved

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Last modified September 16 23:53 EDT 2021. Contains 347477 sequences. (Running on oeis4.)