A230273 Number of nX6 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero

0, 108, 19996, 2348840, 261026756, 28716109350, 3159756711522, 347321368287746, 38183785495750352, 4197613545581221410, 461451167556083194646, 50728172936710501676214, 5576636888940842482458762

Offset

1,2

Comments

Column 6 of A230275

Links

R. H. Hardin, Table of n, a(n) for n = 1..121

Example

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

Crossrefs

Sequence in context: A269272 A209015 A299951 * A230613 A377246 A216592

Adjacent sequences: A230270 A230271 A230272 * A230274 A230275 A230276

Keyword

nonn

Author

R. H. Hardin, Oct 14 2013

Status

approved