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A252900 Number of (n+2)X(2+2) 0..3 arrays with every consecutive three elements in every row and column having exactly two distinct values, and new values 0 upwards introduced in row major order 1
2793, 30453, 306680, 3255537, 33858062, 357165303, 3740990254, 39381278095, 413451112737, 4347775265112, 45683304899259, 480233990713908, 5047003232714437, 53050317963040942, 557570119871186926 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A252904

LINKS

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

EXAMPLE

Some solutions for n=2

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

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

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

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

CROSSREFS

Sequence in context: A252601 A233923 A340174 * A236637 A236943 A236777

Adjacent sequences:  A252897 A252898 A252899 * A252901 A252902 A252903

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 24 2014

STATUS

approved

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Last modified May 25 02:55 EDT 2022. Contains 354047 sequences. (Running on oeis4.)