A186937 Number of (n+1)X8 binary arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces

2688, 108128, 1152312, 16124472, 199197496, 2731872328, 35582947920, 475637108896, 6259259510232, 83202139545720, 1098854338919104, 14592496893162664, 192979665562053704, 2559688265009129904

Offset

1,1

Comments

Column 7 of A186939

Links

R. H. Hardin, Table of n, a(n) for n = 1..94

Example

Some solutions for 4X8
..0..0..1..1..1..0..1..0....1..1..1..1..1..1..0..1....0..0..1..0..1..1..0..1
..0..1..1..1..0..0..1..1....0..1..1..1..1..0..0..0....0..0..1..0..0..1..1..1
..0..0..0..1..0..0..1..1....0..0..0..0..1..1..0..0....0..0..1..1..0..0..1..0
..0..0..0..0..0..0..1..0....0..0..0..0..0..1..0..1....1..0..0..1..1..0..1..0

Crossrefs

Sequence in context: A350184 A186833 A229682 * A185748 A252404 A020424

Adjacent sequences: A186934 A186935 A186936 * A186938 A186939 A186940

Keyword

nonn

Author

R. H. Hardin Mar 01 2011

Status

approved