A231054 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 and at least one element with value (x(i,j)-1) mod 4, no adjacent elements equal, and upper left element zero

0, 70, 16198, 209440, 7293728, 448752816, 22665736960, 1062745551964, 51169742197940, 2490580691600010, 120768122138064308, 5846745297848730442, 283216346242793114828, 13722274843334336410906, 664810299194759446763984

Offset

1,2

Comments

Row 6 of A231049

Links

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

Example

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

Crossrefs

Sequence in context: A362916 A229776 A362169 * A007100 A103157 A364305

Adjacent sequences: A231051 A231052 A231053 * A231055 A231056 A231057

Keyword

nonn

Author

R. H. Hardin, Nov 03 2013

Status

approved