A230923 Number of nX5 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, 3108, 154632, 28978992, 4265306528, 635678359988, 95355343910570, 14264086558627070, 2135123511088831648, 319568536170962822998, 47830472197175088248834, 7158916142523278823866052

Offset

1,2

Comments

Column 5 of A230926

Links

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

Example

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

Crossrefs

Sequence in context: A229410 A257356 A187593 * A137839 A343373 A238513

Adjacent sequences: A230920 A230921 A230922 * A230924 A230925 A230926

Keyword

nonn

Author

R. H. Hardin, Nov 01 2013

Status

approved