A230829 Number of nX6 0..3 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 4 and at least one element with value (x(i,j)-1) mod 4, no adjacent elements equal, and upper left element zero

0, 44, 130, 734, 4350, 29446, 201592, 1388526, 9649244, 67351066, 471449136, 3305467604, 23199674400, 162919918906, 1144420036726, 8039945941588, 56486945293530, 396878171736174, 2788524347614420, 19592806908395710

Offset

1,2

Comments

Column 6 of A230831

Links

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

Example

Some solutions for n=4
..0..1..3..1..3..0....0..1..2..1..3..0....0..3..0..3..0..1....0..1..0..1..0..3
..3..2..0..2..1..2....3..0..3..0..2..1....1..2..1..2..3..2....3..2..3..2..1..2
..0..3..1..3..0..3....2..1..2..1..3..0....3..0..3..0..1..0....1..0..1..3..0..3
..1..2..0..2..1..0....3..0..3..0..2..1....1..2..1..3..2..3....3..2..0..2..1..0

Crossrefs

Sequence in context: A044676 A253327 A253320 * A358818 A183642 A183634

Adjacent sequences: A230826 A230827 A230828 * A230830 A230831 A230832

Keyword

nonn

Author

R. H. Hardin, Oct 30 2013

Status

approved