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A237722 Number of (n+1)X(n+1) 0..2 arrays with the maximum plus the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 0
81, 2152, 122940, 15828110, 4174594857, 2309067655254, 2784288129137988, 7531980120186764378 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A237730

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A237376 A296577 A237316 * A250436 A237545 A253399

Adjacent sequences:  A237719 A237720 A237721 * A237723 A237724 A237725

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 12 2014

STATUS

approved

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Last modified January 18 19:38 EST 2020. Contains 331029 sequences. (Running on oeis4.)