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A235836 Number of (4+1)X(n+1) 0..2 arrays with the difference of the upper median and minimum value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise 1
20537, 1378463, 87276535, 4948377018, 265469754317, 13462405996292, 655276302552671, 30775243815415173, 1403763801656275930, 62473920005481373345, 2723821189454625298291, 116744916159554640181931 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A235833

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..79

EXAMPLE

Some solutions for n=1

..0..1....2..1....0..2....2..0....0..2....2..2....1..0....0..0....2..1....1..2

..1..2....0..2....2..1....2..0....2..2....0..1....1..1....2..2....2..1....1..2

..2..1....2..0....1..2....0..1....0..1....2..1....0..1....1..0....1..0....1..0

..2..2....0..2....2..2....1..2....2..2....1..1....1..1....1..2....2..1....1..0

..2..1....0..0....1..1....0..1....1..0....2..1....2..2....1..0....1..2....1..1

CROSSREFS

Sequence in context: A253539 A178585 A187282 * A235831 A235587 A082254

Adjacent sequences:  A235833 A235834 A235835 * A235837 A235838 A235839

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 16 2014

STATUS

approved

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Last modified December 3 22:11 EST 2020. Contains 338920 sequences. (Running on oeis4.)