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A232312
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Number of (n+1)X(4+1) 0..1 arrays with every element equal to some horizontal or antidiagonal neighbor, with top left element zero
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1
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52, 853, 14042, 231454, 3815483, 62897985, 1036869496, 17092731689, 281772661177, 4645005493684, 76572638191385, 1262295368124753, 20808863766803180, 343032876614802177, 5654876487122281889
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OFFSET
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1,1
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COMMENTS
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Column 4 of A232316
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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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FORMULA
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Empirical: a(n) = 19*a(n-1) -44*a(n-2) +43*a(n-3) -19*a(n-4) +4*a(n-5) -2*a(n-6) for n>7
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EXAMPLE
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Some.solutions.for.n=3
..0..0..0..1..1....0..0..1..1..1....0..0..0..1..1....0..0..1..0..1
..1..1..1..0..1....0..0..1..1..0....0..0..1..1..1....0..1..0..1..1
..0..0..0..1..1....0..0..0..0..0....0..0..1..1..0....1..1..1..0..0
..0..0..1..1..1....1..1..0..0..0....0..0..1..0..0....0..0..0..0..0
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CROSSREFS
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Sequence in context: A160344 A163691 A007247 * A278001 A083936 A273655
Adjacent sequences: A232309 A232310 A232311 * A232313 A232314 A232315
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Nov 22 2013
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STATUS
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approved
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