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A203845 Number of nX7 0..3 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors 1
1, 3502, 4683983, 2828543595, 1851737877261, 1343321735549790, 962798716189325069, 683655464831096685412, 487678114181526321589432, 348497070880545014679320935, 248863069745305150479109312811 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A203846

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..12

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A252049 A108117 A233992 * A257316 A224724 A338978

Adjacent sequences:  A203842 A203843 A203844 * A203846 A203847 A203848

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 06 2012

STATUS

approved

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Last modified September 25 15:27 EDT 2021. Contains 347658 sequences. (Running on oeis4.)