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A203436 Number of n X n 0..7 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors 0
1, 8, 4124, 24278164, 1842430382222 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A203443
LINKS
EXAMPLE
Some solutions for n=5
..6..7..7..6..0....1..4..4..3..0....2..7..7..7..2....5..6..7..7..6
..6..7..7..6..1....4..4..7..7..3....6..7..0..7..6....7..7..7..7..6
..4..7..7..2..1....7..7..7..7..3....6..7..2..7..6....7..7..1..1..5
..1..3..1..6..6....7..1..1..7..4....2..7..2..7..0....5..2..2..0..5
..1..3..3..6..6....7..7..7..7..4....2..7..7..7..0....5..5..5..5..5
CROSSREFS
Sequence in context: A013742 A209592 A060760 * A159368 A167065 A303895
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 01 2012
STATUS
approved

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Last modified March 19 06:32 EDT 2024. Contains 370953 sequences. (Running on oeis4.)