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A202639 Number of (n+2)X(n+2) binary arrays avoiding patterns 000 and 111 in rows, columns and nw-to-se diagonals 0
66, 530, 7432, 171362, 6324344, 386981422, 38841628112, 6372413856774, 1725107798449008, 768319633522920162 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A202647

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A063249 A106212 A155022 * A175260 A233065 A129218

Adjacent sequences:  A202636 A202637 A202638 * A202640 A202641 A202642

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 22 2011

STATUS

approved

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Last modified February 16 09:04 EST 2019. Contains 320159 sequences. (Running on oeis4.)