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A207655 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 0 vertically 0
2, 16, 84, 870, 13902, 264568, 12327618, 1144562438, 64916691796, 20511370392174, 15431327748576322, 2046762983891357336, 5203964479172695849850, 32433326970178563780859912 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A207661

LINKS

Table of n, a(n) for n=1..14.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A207340 A207768 A207891 * A071893 A220505 A069440

Adjacent sequences:  A207652 A207653 A207654 * A207656 A207657 A207658

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 19 2012

STATUS

approved

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Last modified December 5 16:13 EST 2021. Contains 349557 sequences. (Running on oeis4.)