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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
OFFSET
1,2
COMMENTS
Column 7 of A203846
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 06 2012
STATUS
approved