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A203842 Number of nX4 0..3 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors 1
1, 50, 2706, 84346, 2507842, 83049596, 2828543595, 95696351404, 3237561922069, 109915983761733, 3737520454582311, 127129254610881462, 4325197729686697158, 147185372366419480113, 5009327110121467821581, 170498121168210026695996 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 4 of A203846
LINKS
EXAMPLE
Some solutions for n=4
..0..2..3..3....2..2..0..0....2..2..3..3....3..3..3..1....1..1..0..0
..3..3..3..3....2..2..0..0....2..0..3..3....3..0..3..3....1..1..3..3
..3..2..0..3....0..3..3..1....2..2..0..1....3..0..0..3....0..3..3..3
..3..3..3..3....0..3..3..1....2..2..1..1....3..3..3..3....0..3..3..1
CROSSREFS
Sequence in context: A165800 A042201 A097838 * A251058 A239653 A223661
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 06 2012
STATUS
approved

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Last modified April 22 18:29 EDT 2024. Contains 371906 sequences. (Running on oeis4.)