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A238021
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Number of (n+2)X(1+2) 0..1 arrays with the (lower) medians of each row unequal to its neighbors and each column equal to its neighbors
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1
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20, 146, 260, 1820, 3752, 24818, 56612, 355364, 872600, 5238356, 13605608, 78675128, 213600848, 1196862482, 3368311460, 18375903380, 53276769080, 284073991196, 844510526840, 4414662677384, 13408173196592, 68889810592532
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OFFSET
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1,1
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COMMENTS
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Column 1 of A238026
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..89
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EXAMPLE
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Some solutions for n=5
..0..1..1....1..1..1....1..1..0....1..1..1....1..1..1....0..1..0....0..0..0
..0..0..1....1..0..0....1..0..0....0..0..1....0..1..0....1..0..1....1..1..0
..1..0..1....1..1..1....1..1..1....1..1..1....1..1..1....0..0..0....0..0..1
..1..0..0....0..1..0....1..0..0....0..1..0....0..0..1....1..1..0....1..1..0
..1..1..1....0..1..1....1..1..1....1..0..1....1..0..1....0..0..1....0..1..0
..0..1..0....1..0..0....0..0..1....0..0..1....0..1..0....1..0..1....1..0..1
..1..1..1....0..1..1....0..1..1....1..1..1....1..1..1....0..0..0....0..0..0
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CROSSREFS
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Sequence in context: A071816 A263960 A190067 * A183959 A094171 A100190
Adjacent sequences: A238018 A238019 A238020 * A238022 A238023 A238024
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Feb 17 2014
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STATUS
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approved
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