A204298 Number of nX5 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1, and 2 introduced before 3 in row major order.

0, 68, 2816, 56104, 6709692, 277234340, 17549848472, 989144587700, 56401739559508, 3243490787117120, 185616775824121080, 10613030876477577172, 608452096582821248424, 34821076779055371520292, 1994342945781220272004220

Offset

1,2

Comments

Column 5 of A204301

Links

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

Example

Some solutions for n=4
..1..1..0..1..2....2..0..0..1..0....1..0..0..1..2....1..0..0..0..1
..0..3..0..1..0....1..1..1..1..0....1..0..0..1..0....1..0..1..1..1
..0..1..0..1..0....0..1..0..1..1....1..1..0..1..0....1..0..2..0..0
..2..1..0..1..3....0..1..0..0..2....0..0..2..1..0....1..0..3..1..1

Crossrefs

Sequence in context: A035729 A035802 A017731 * A281556 A093268 A231250

Adjacent sequences: A204295 A204296 A204297 * A204299 A204300 A204301

Keyword

nonn

Author

R. H. Hardin, Jan 14 2012

Status

approved