A187724 Number of (n+1)X5 binary arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors

391, 2804, 20684, 161571, 1252304, 9823368, 76931991, 603313744, 4730797071, 37100667206, 290947460647, 2281693532812, 17893663414565, 140326848073352, 1100482594455998, 8630285459242719, 67681077927288230, 530773701234315911

Offset

1,1

Comments

Column 4 of A187729

Links

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

Example

Some solutions for 3X5
..0..0..1..1..0....1..1..0..0..1....0..1..0..1..1....0..0..1..0..1
..0..1..0..1..1....1..1..0..1..1....0..1..1..0..0....0..1..1..1..1
..1..1..1..1..0....1..0..0..1..1....1..0..1..1..1....1..1..0..1..1

Crossrefs

Sequence in context: A158004 A264448 A160184 * A035883 A235188 A248022

Adjacent sequences: A187721 A187722 A187723 * A187725 A187726 A187727

Keyword

nonn

Author

R. H. Hardin Mar 13 2011

Status

approved