A183257 - OEIS

A183257

Number of nX2 binary arrays with the number of 0-1 adjacencies equal to the number of 0-0 adjacencies

1, 5, 5, 22, 59, 220, 696, 2461, 8369, 29428, 102630, 362367, 1279602, 4543607, 16162785, 57675462, 206201571, 738775652, 2651221982, 9529517263, 34299467544, 123610022089, 445975109063, 1610716681940, 5822890609444, 21068656243015

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

OFFSET

1,2

COMMENTS

Column 2 of A183262

LINKS

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

EXAMPLE

Some solutions for 5X2

..1..0....0..0....0..1....0..0....1..0....0..1....0..1

..1..0....0..0....0..1....0..1....1..1....0..1....0..0

..1..0....1..1....0..0....0..1....1..1....1..1....1..0

..1..0....1..1....0..1....0..1....0..0....0..0....1..0

..0..0....0..1....0..0....0..1....0..0....0..0....0..0

CROSSREFS

Sequence in context: A014619 A205140 A097016 * A255456 A338936 A175713

Adjacent sequences: A183254 A183255 A183256 * A183258 A183259 A183260

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 03 2011

STATUS

approved