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A203342
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Number of nX4 0..4 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors
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1
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1, 95, 9555, 503409, 23912553, 1288066857, 72606563663, 4048732987777, 224803736954347, 12536125586656167, 701080855015785026, 39228019277755257087, 2195365093327710655400, 122904723679862273403598
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OFFSET
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1,2
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COMMENTS
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Column 4 of A203346
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..210
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EXAMPLE
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Some solutions for n=5
..1..4..4..0....4..4..0..0....4..4..1..0....4..4..1..0....2..4..4..2
..3..4..4..1....4..4..3..2....4..4..2..1....4..4..3..0....2..4..4..2
..3..3..1..1....2..3..4..4....1..4..2..1....4..2..3..0....0..3..0..0
..0..0..2..2....3..4..4..4....2..4..4..4....4..4..4..0....1..4..4..4
..0..0..2..2....3..4..4..3....2..3..4..4....1..4..4..0....1..4..4..4
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CROSSREFS
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Sequence in context: A060484 A017811 A017758 * A203187 A103281 A057400
Adjacent sequences: A203339 A203340 A203341 * A203343 A203344 A203345
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin Dec 31 2011
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STATUS
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approved
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