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A207340 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 0 and 1 1 1 vertically 1
2, 16, 84, 828, 9668, 128292, 2367656, 53882188, 1466226618, 53206438448, 2394759800657, 133358534841765, 9689628432751700, 882639945891070144, 101352502023903785258, 15016562984066207345796, 2813722789748877650099592 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A207346

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A207263 A207757 A283951 * A207768 A207891 A207655

Adjacent sequences:  A207337 A207338 A207339 * A207341 A207342 A207343

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 17 2012

STATUS

approved

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Last modified November 29 20:40 EST 2021. Contains 349416 sequences. (Running on oeis4.)