A183808 - OEIS

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

(list; graph; refs; listen; history; text; internal format)

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