A207922 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 0 and 1 0 1 vertically

42, 1764, 12994, 101069, 628945, 4105063, 28188778, 187980955, 1245595210, 8342244698, 55794408879, 372138707621, 2485175186365, 16603501309984, 110873077840653, 740391497518318, 4944900311857882, 33024243581797845

Offset

1,1

Comments

Row 7 of A207918

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A207660 A207452 A208554 * A208702 A207471 A207523

Adjacent sequences: A207919 A207920 A207921 * A207923 A207924 A207925

Keyword

nonn

Author

R. H. Hardin Feb 21 2012

Status

approved