A183808 1/16 the number of (n+1)X7 binary arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor

243, 4341, 70044, 1232595, 20745787, 360549804, 6153770375, 106324742825, 1823862776230, 31435034643715, 540242027044863, 9301932692926094, 159977961165737219, 2753396085474939071, 47367137650822979126

Offset

1,1

Comments

Column 6 of A183811

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions with upper left block zero for 3X7
..0..0..1..0..0..1..0....0..0..0..1..0..0..1....0..0..1..1..1..0..0
..0..0..1..1..1..0..0....0..0..1..1..0..1..1....0..0..1..0..0..0..1
..1..0..0..0..1..1..1....1..1..0..0..0..1..1....1..1..0..0..1..1..1

Crossrefs

Sequence in context: A029700 A224003 A232027 * A231913 A223280 A224356

Adjacent sequences: A183805 A183806 A183807 * A183809 A183810 A183811

Keyword

nonn

Author

R. H. Hardin Jan 07 2011

Status

approved