A230924 Number of nX6 0..2 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3 and at least one element with value (x(i,j)-1) mod 3, and upper left element zero

0, 22428, 2772906, 1509045552, 635678359988, 270258566366420, 115824906242444524, 49485565220035538028, 21156805616540924557940, 9044496465346856530533020, 3866495604500081195895769776

Offset

1,2

Comments

Column 6 of A230926

Links

R. H. Hardin, Table of n, a(n) for n = 1..117

Example

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

Crossrefs

Sequence in context: A329787 A224648 A237215 * A250441 A204305 A251116

Adjacent sequences: A230921 A230922 A230923 * A230925 A230926 A230927

Keyword

nonn

Author

R. H. Hardin, Nov 01 2013

Status

approved