A185748 Number of (n+1) X 8 binary arrays with every 2 X 2 subblock trace equal to some horizontal or vertical neighbor 2 X 2 subblock trace.

2688, 304584, 18242392, 1188841336, 77691779712, 5075186680192, 331658427568088, 21671299631697840, 1416043303932297408, 92529833667730376464, 6046241027601786546504, 395082861406622455945776

Offset

1,1

Comments

Column 7 of A185750.

Links

R. H. Hardin, Table of n, a(n) for n = 1..169

Example

Some solutions for 3 X 8
..0..1..1..1..0..0..1..1....0..0..1..1..0..0..1..1....0..1..0..1..1..1..1..1
..0..0..1..1..1..1..1..1....0..1..1..1..0..1..1..1....0..1..0..1..1..1..1..1
..0..0..1..0..1..0..0..1....1..1..0..1..1..1..1..1....0..1..0..1..1..0..0..1

Crossrefs

Cf. A185750.

Sequence in context: A186833 A229682 A186937 * A252404 A020424 A281406

Adjacent sequences: A185745 A185746 A185747 * A185749 A185750 A185751

Keyword

nonn

Author

R. H. Hardin, Feb 01 2011

Status

approved