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A207768 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 0 1 0 vertically 1
2, 16, 84, 828, 11950, 195160, 6513576, 364308938, 15284596082, 2700018736020, 787454317079753, 72216754252055376, 73270546375550142283, 119728540088330705652453, 22114539991379386419299095 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A207774

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..18

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A207757 A283951 A207340 * A207891 A207655 A071893

Adjacent sequences:  A207765 A207766 A207767 * A207769 A207770 A207771

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 20 2012

STATUS

approved

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Last modified October 17 21:17 EDT 2021. Contains 348065 sequences. (Running on oeis4.)