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A237464 Number of (n+1)X(n+1) 0..2 arrays with the maximum plus the lower median minus the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 0
81, 2308, 143780, 21134116, 6781496755, 4700362341374, 7302593738902292, 26735744862459553294, 211398124707561970968488 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A237472

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A237545 A253399 A236820 * A233023 A236989 A038676

Adjacent sequences:  A237461 A237462 A237463 * A237465 A237466 A237467

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 08 2014

STATUS

approved

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Last modified May 23 04:06 EDT 2022. Contains 353959 sequences. (Running on oeis4.)