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A236820 Number of (n+1)X(n+1) 0..2 arrays with the maximum plus the minimum minus the lower median of every 2X2 subblock equal 0
81, 2211, 168564, 36874967, 21755065689, 36178398554012, 161548363232714369, 1994329748960606374641 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A236828

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A250436 A237545 A253399 * A237464 A233023 A236989

Adjacent sequences:  A236817 A236818 A236819 * A236821 A236822 A236823

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 31 2014

STATUS

approved

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Last modified January 22 16:37 EST 2020. Contains 331152 sequences. (Running on oeis4.)