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A207780 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 0 and 1 0 1 vertically 1
2, 16, 98, 791, 6766, 65094, 786907, 9855231, 142116676, 2459545057, 46309750425, 999589825419, 26202502382134, 768926273969151, 25878896800392858, 1098191860946291476, 52205734467966457603, 2867736141204451650414 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A207785

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..19

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A207105 A207387 A207934 * A207461 A207515 A207913

Adjacent sequences:  A207777 A207778 A207779 * A207781 A207782 A207783

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 20 2012

STATUS

approved

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Last modified August 19 16:05 EDT 2022. Contains 356229 sequences. (Running on oeis4.)