A203458 Number of nX6 0..2 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors

1, 209, 29677, 2527020, 231588325, 22078482448, 2078403848722, 195550611728699, 18462917498925709, 1743348624980118002, 164530017863130381978, 15527422729883740377106, 1465484485283794984735686

Offset

1,2

Comments

Column 6 of A203460

Links

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

Example

Some solutions for n=5
..1..2..2..1..1..0....2..2..1..0..0..0....1..2..2..1..2..2....2..2..0..0..0..0
..1..2..2..1..1..0....2..2..1..0..0..0....1..2..2..1..2..2....2..2..1..2..2..0
..1..0..0..1..2..2....2..2..0..2..2..2....0..2..1..2..2..2....1..1..1..2..2..1
..2..2..1..2..2..2....1..0..0..2..0..2....0..2..1..2..1..1....1..0..0..1..0..1
..2..2..2..2..1..1....1..1..1..2..2..2....0..2..2..2..0..0....1..1..1..1..1..1

Crossrefs

Sequence in context: A316509 A317463 A029554 * A003779 A268659 A265682

Adjacent sequences: A203455 A203456 A203457 * A203459 A203460 A203461

Keyword

nonn

Author

R. H. Hardin Jan 02 2012

Status

approved