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A207803 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 0 and 1 0 1 vertically 1
2, 16, 102, 1970, 57184, 3511534, 388134978, 82999241712, 33304563708790, 25409866877400042, 36648009080479725120, 100161609586888545878490, 518205987191621802807914102, 5077481011895003740693688753360 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A207808

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..20

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A207945 A207853 A208022 * A059204 A187248 A236958

Adjacent sequences:  A207800 A207801 A207802 * A207804 A207805 A207806

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 20 2012

STATUS

approved

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Last modified December 7 07:15 EST 2016. Contains 278841 sequences.