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

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