A207014 Number of nX7 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row or column

1121, 1256641, 555815721, 303753655993, 159875651653873, 84153991018875649, 44164224032234465777, 23199181514556014200473, 12192821954330775340942049, 6408564367559028803363645001, 3368028976953893638418482360481

Offset

1,1

Comments

Column 7 of A207015

Links

R. H. Hardin, Table of n, a(n) for n = 1..78

Example

Some solutions for n=4
..0..1..1..2..2..2..0....1..1..0..2..1..0..2....0..0..2..0..0..2..1
..1..2..0..1..1..2..2....2..2..1..1..1..1..0....2..1..1..1..1..2..0
..1..2..2..0..0..2..1....0..0..1..1..1..1..0....1..2..0..1..1..1..2
..0..0..0..0..2..2..1....2..1..0..2..1..1..0....0..2..2..2..2..0..1

Crossrefs

Sequence in context: A122052 A207234 A207227 * A203189 A317962 A334963

Adjacent sequences: A207011 A207012 A207013 * A207015 A207016 A207017

Keyword

nonn

Author

R. H. Hardin Feb 14 2012

Status

approved