A222914 Number of nX3 0..2 arrays with exactly floor(nX3/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order

0, 18, 160, 2952, 17518, 356398, 2118905, 44960137, 272872198, 5911110630, 36457959703, 799084046960, 4981910445036, 110019357014516, 690925392478349, 15339905237756384, 96831631047966404, 2158535060733668360

Offset

1,2

Comments

Column 3 of A222918

Links

R. H. Hardin, Table of n, a(n) for n = 1..169

Example

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

Crossrefs

Sequence in context: A300078 A119004 A002698 * A171642 A158808 A271899

Adjacent sequences: A222911 A222912 A222913 * A222915 A222916 A222917

Keyword

nonn

Author

R. H. Hardin Mar 09 2013

Status

approved