A205229 Number of (n+1)X3 0..2 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing, and all 2X2 permanents nonzero

266, 2773, 27157, 221766, 1707082, 11675764, 76088840, 460518847, 2683735998, 14905311330, 80378339143, 419363315736, 2137855359517, 10641083611371, 51996072608754, 249514965798706, 1179572239075227, 5497644720565445

Offset

1,1

Comments

Column 2 of A205235

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..2..2..1....1..1..1....2..2..2....2..0..2....2..0..2....2..1..0....2..0..2
..2..0..2....0..1..2....0..1..0....2..1..1....0..1..0....2..0..2....0..2..2
..2..2..0....2..1..0....2..2..2....2..0..2....2..1..2....1..1..1....2..0..2
..2..0..2....1..1..1....1..2..2....1..1..2....0..2..0....1..1..1....1..2..2
..1..2..2....1..2..0....2..2..2....1..1..1....2..0..2....2..0..2....2..1..2

Crossrefs

Sequence in context: A260134 A242320 A225935 * A028523 A265034 A278625

Adjacent sequences: A205226 A205227 A205228 * A205230 A205231 A205232

Keyword

nonn

Author

R. H. Hardin Jan 24 2012

Status

approved