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A203099 Number of nX6 0..3 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor 1
422, 1705124, 3790420430, 7574530822364, 15712898935252156, 32766523337754473494, 68145439667266350435686, 141695919109060311625392330, 294680177794961913094327501892 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A203101

LINKS

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

EXAMPLE

Some solutions for n=5

..1..1..0..1..1..0....3..3..3..3..0..1....1..2..3..1..0..1....2..3..3..2..2..2

..3..0..2..1..1..0....2..0..2..1..1..1....3..3..3..3..2..1....2..2..1..1..1..2

..3..1..3..1..0..2....3..2..1..1..0..1....1..2..2..0..0..2....2..3..0..1..2..2

..0..1..3..0..2..2....3..0..2..1..1..0....1..1..2..2..0..2....0..3..3..3..2..1

..0..2..3..3..1..0....2..0..3..3..2..1....3..3..2..1..2..2....2..2..1..2..1..1

CROSSREFS

Sequence in context: A248455 A238285 A231939 * A096024 A205980 A206662

Adjacent sequences:  A203096 A203097 A203098 * A203100 A203101 A203102

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 29 2011

STATUS

approved

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Last modified December 2 23:09 EST 2020. Contains 338898 sequences. (Running on oeis4.)