A230693 Number of (n+2)X(4+2) 0..2 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least two elements with value (x(i,j)+1) mod 3, and upper left element zero

139, 2494, 442490, 50969202, 5571354016, 635625937026, 71568693539665, 8064304231273262, 909421551471875673, 102518796091518896672, 11557598996944627213330, 1302976030063695509658709

Offset

1,1

Comments

Column 4 of A230694

Links

R. H. Hardin, Table of n, a(n) for n = 1..31

Example

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

Crossrefs

Sequence in context: A175017 A271977 A217724 * A223163 A158527 A201174

Adjacent sequences: A230690 A230691 A230692 * A230694 A230695 A230696

Keyword

nonn

Author

R. H. Hardin, Oct 27 2013

Status

approved