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A203401 Number of (n+2)X(n+2) binary arrays avoiding patterns 000 and 111 in rows and columns 0
102, 2030, 60232, 3858082, 446672706, 101578277384, 43680343039806, 36133311325799774, 57061338836892846628, 172603583392706027305210 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A203407

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A163435 A223308 A230737 * A217331 A284448 A274252

Adjacent sequences:  A203398 A203399 A203400 * A203402 A203403 A203404

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 01 2012

STATUS

approved

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Last modified December 15 20:00 EST 2019. Contains 330000 sequences. (Running on oeis4.)