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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
OFFSET
1,2
COMMENTS
Column 7 of A203346
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 31 2011
STATUS
approved