A223099 Number of nX3 0..2 arrays with exactly floor(nX3/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order

0, 24, 546, 13416, 255216, 6939648, 137988216, 3821347968, 77212900320, 2167927320192, 44216000738976, 1253102341234176, 25727713443075456, 733955159958484992, 15142169638905698688, 434105972073233465856

Offset

1,2

Comments

Column 3 of A223104

Links

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

Example

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

Crossrefs

Sequence in context: A121905 A192835 A235118 * A187671 A362357 A162810

Adjacent sequences: A223096 A223097 A223098 * A223100 A223101 A223102

Keyword

nonn

Author

R. H. Hardin Mar 14 2013

Status

approved