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A203382 Number of n X n 0..6 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors 0
1, 7, 2422, 7951793, 307215779816 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A203389
LINKS
EXAMPLE
Some solutions for n=4
..3..3..3..0....6..6..0..0....2..2..1..0....3..3..1..0....2..2..3..3
..3..6..6..3....6..6..5..3....3..3..4..4....3..5..5..4....2..4..6..6
..0..6..6..3....3..5..5..3....3..6..6..4....4..6..6..4....2..4..6..6
..0..4..4..3....0..0..0..0....0..6..6..0....4..6..6..0....0..0..0..0
CROSSREFS
Sequence in context: A209591 A060759 A067504 * A249352 A264743 A210405
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 01 2012
STATUS
approved

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Last modified March 19 06:05 EDT 2024. Contains 370952 sequences. (Running on oeis4.)