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A203440 Number of nX5 0..7 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors 0
1, 2528, 4401184, 3216740482, 1842430382222, 1163067191357930, 781112517644514067, 520944312459613615031, 344915375300852781639149, 229146836391481660904752370, 152707095706138036937766893448 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 5 of A203443

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=5

..3..3..1..3..3....5..5..4..7..7....3..4..4..3..0....1..5..5..3..0

..3..3..3..3..3....7..7..1..7..7....4..6..6..5..0....6..6..5..5..0

..7..7..6..3..0....7..7..0..7..7....4..6..6..5..0....6..6..2..5..4

..7..7..6..0..0....6..5..6..6..1....7..7..3..5..4....7..7..3..6..6

..5..5..5..0..0....6..6..6..2..0....7..7..5..5..4....7..7..2..6..6

CROSSREFS

Sequence in context: A111729 A252288 A268332 * A231968 A172142 A206596

Adjacent sequences:  A203437 A203438 A203439 * A203441 A203442 A203443

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 01 2012

STATUS

approved

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Last modified November 28 08:12 EST 2021. Contains 349401 sequences. (Running on oeis4.)