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

2, 16, 84, 828, 9668, 128292, 2367656, 53882188, 1466226618, 53206438448, 2394759800657, 133358534841765, 9689628432751700, 882639945891070144, 101352502023903785258, 15016562984066207345796, 2813722789748877650099592

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