A186934 Number of (n+1) X 5 binary arrays with every 2 X 2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2 X 2 subblock traces.

144, 1664, 10496, 59720, 400192, 2504264, 16124472, 102475864, 654285152, 4168475512, 26600834384, 169634278408, 1082068348632, 6900437984584, 44011928616896, 280696997413664, 1790295379221024, 11418170020374768

Offset

1,1

Comments

Column 4 of A186939.

Links

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

Example

Some solutions for 4 X 5
..1..1..0..1..0....1..1..0..0..1....1..1..1..1..0....0..0..0..0..0
..1..0..0..1..0....1..0..0..0..1....1..0..0..0..0....1..1..1..0..0
..0..0..0..0..0....1..1..1..0..1....1..1..0..0..1....1..1..1..1..1
..1..0..0..1..1....1..1..0..0..1....0..1..1..0..1....0..0..0..1..0

Crossrefs

Cf. A186939.

Sequence in context: A209205 A223594 A223445 * A356731 A368508 A066445

Adjacent sequences: A186931 A186932 A186933 * A186935 A186936 A186937

Keyword

nonn

Author

R. H. Hardin, Mar 01 2011

Status

approved