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A203341 Number of nX3 0..4 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors 1
1, 25, 635, 9555, 142167, 2566719, 48091042, 870803077, 15677729113, 285592250536, 5229626169635, 95709720070629, 1751500859436863, 32083750075804047, 588112814640699586, 10783024853712580946 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 3 of A203346
LINKS
EXAMPLE
Some solutions for n=5
..2..4..4....1..4..4....3..3..2....2..3..3....4..4..3....1..2..2....4..4..2
..3..4..4....2..4..4....3..3..2....2..4..4....4..4..3....3..4..4....4..4..4
..3..3..2....2..0..0....4..4..3....1..4..4....4..0..3....3..4..4....0..3..4
..2..2..0....2..2..0....4..4..4....0..4..4....4..4..4....1..3..3....0..4..4
..0..0..0....2..2..0....1..4..4....0..2..2....4..4..4....0..3..3....0..4..4
CROSSREFS
Sequence in context: A171299 A009969 A042202 * A260048 A152256 A153111
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 31 2011
STATUS
approved

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Last modified February 21 01:11 EST 2024. Contains 370219 sequences. (Running on oeis4.)