A231251 Number of 6Xn 0..3 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero

0, 230, 26658, 968824, 46019438, 2532190370, 138246711032, 7463273437410, 402976497021292, 21783144616290196, 1177676505112866416, 63665644231425324844, 3441753613615266889856, 186061892941455426254038

Offset

1,2

Comments

Row 6 of A231246

Links

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

Example

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

Crossrefs

Sequence in context: A333136 A231061 A231107 * A051183 A251275 A323321

Adjacent sequences: A231248 A231249 A231250 * A231252 A231253 A231254

Keyword

nonn

Author

R. H. Hardin, Nov 06 2013

Status

approved