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A208835 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 1 and 1 1 0 vertically 1
2, 16, 78, 855, 8736, 272206, 6206445, 613538688, 30091441770, 9949962265465, 995860712362464, 1146808937112275178, 223896318271083352427, 927305041435819383020944, 341298409330345173624970966 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A208840

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..37

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A244717 A208102 A207723 * A208683 A197992 A265173

Adjacent sequences:  A208832 A208833 A208834 * A208836 A208837 A208838

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 01 2012

STATUS

approved

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Last modified November 12 19:19 EST 2018. Contains 317116 sequences. (Running on oeis4.)