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A203388 Number of nX7 0..6 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors 0
1, 86156, 1678700434, 10639041328647, 61265314914283103 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A203389

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for n=4

..4..4..2..2..0..4..4....4..4..3..3..0..4..4....0..5..5..5..4..5..5

..4..6..6..2..5..5..4....6..6..3..4..4..4..4....5..5..5..6..6..5..5

..4..6..6..3..5..5..2....6..6..3..4..5..5..4....5..0..4..6..6..5..3

..0..1..1..0..0..0..0....5..5..0..0..5..5..0....5..5..5..5..0..0..0

CROSSREFS

Sequence in context: A234805 A186065 A238309 * A206657 A231322 A237783

Adjacent sequences:  A203385 A203386 A203387 * A203389 A203390 A203391

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 01 2012

STATUS

approved

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Last modified December 6 12:54 EST 2016. Contains 278781 sequences.