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A203458 Number of nX6 0..2 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors 1
1, 209, 29677, 2527020, 231588325, 22078482448, 2078403848722, 195550611728699, 18462917498925709, 1743348624980118002, 164530017863130381978, 15527422729883740377106, 1465484485283794984735686 (list; graph; refs; listen; history; text; internal format)
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

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Last modified February 22 12:33 EST 2020. Contains 332136 sequences. (Running on oeis4.)