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A236811 Number of (n+1)X(n+1) 0..2 arrays with the maximum plus the lower median minus the minimum of every 2X2 subblock equal 0
81, 1791, 98380, 14757359, 5737086630, 6170884344818, 17618985802053806, 134095020019313452963 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A236819
LINKS
EXAMPLE
Some solutions for n=3
..2..0..0..0....1..1..0..0....2..0..0..1....0..1..2..1....0..2..0..2
..2..0..2..0....2..1..1..2....1..0..2..0....2..0..0..0....0..2..0..2
..0..0..1..0....1..2..2..1....0..2..0..2....2..0..2..1....0..0..0..2
..0..2..0..2....2..1..1..1....0..1..0..0....2..0..1..2....1..2..1..0
CROSSREFS
Sequence in context: A328683 A236057 A205910 * A206669 A223206 A296650
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 31 2014
STATUS
approved

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Last modified July 15 12:56 EDT 2024. Contains 374332 sequences. (Running on oeis4.)