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A238021 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 1
20, 146, 260, 1820, 3752, 24818, 56612, 355364, 872600, 5238356, 13605608, 78675128, 213600848, 1196862482, 3368311460, 18375903380, 53276769080, 284073991196, 844510526840, 4414662677384, 13408173196592, 68889810592532 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A238026

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..89

EXAMPLE

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

CROSSREFS

Sequence in context: A071816 A263960 A190067 * A183959 A094171 A100190

Adjacent sequences:  A238018 A238019 A238020 * A238022 A238023 A238024

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 17 2014

STATUS

approved

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Last modified October 30 03:24 EDT 2020. Contains 338076 sequences. (Running on oeis4.)