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A238027 Number of (1+2)X(n+2) 0..1 arrays with the (lower) medians of each row unequal to its neighbors and each column equal to its neighbors 1
20, 74, 212, 828, 2312, 9178, 25652, 102356, 287960, 1150916, 3260168, 13037240, 37151120, 148591610, 425537780, 1702102500, 4894629560, 19578333484, 56494758872, 225978330056, 653985816944, 2615940563620, 7589574333512 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 1 of A238026

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..167

EXAMPLE

Some solutions for n=5

..0..0..0..1..0..0..0....0..0..0..0..0..0..0....1..0..1..1..1..1..1

..1..0..0..0..1..1..1....0..0..1..1..1..0..1....1..1..0..0..0..1..0

..0..1..0..0..0..0..0....0..0..0..0..0..0..0....1..1..1..1..1..0..1

CROSSREFS

Sequence in context: A010008 A237617 A000529 * A005565 A320484 A066126

Adjacent sequences:  A238024 A238025 A238026 * A238028 A238029 A238030

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 17 2014

STATUS

approved

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Last modified May 17 12:55 EDT 2021. Contains 343971 sequences. (Running on oeis4.)