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A203345 Number of nX7 0..4 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors 0
1, 12487, 48091042, 72606563663, 112737045408576, 202012748290560363 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A203346

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for n=5

..1..3..4..4..3..3..0....3..3..0..3..3..2..0....0..0..0..1..4..4..1

..4..4..4..4..2..3..2....3..3..1..3..3..2..0....1..2..2..1..4..4..3

..4..1..0..2..3..3..2....4..4..1..1..4..4..2....1..3..3..4..4..3..3

..4..2..3..3..3..4..4....4..4..4..4..4..4..2....1..3..1..4..3..4..4

..4..4..4..4..4..4..4....4..4..2..0..2..2..1....0..3..3..4..4..4..4

CROSSREFS

Sequence in context: A272132 A206664 A033669 * A232104 A122726 A072891

Adjacent sequences:  A203342 A203343 A203344 * A203346 A203347 A203348

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 31 2011

STATUS

approved

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Last modified July 4 05:35 EDT 2022. Contains 355064 sequences. (Running on oeis4.)