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A205238 Number of (n+1)X(n+1) 0..2 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock differing from the number in each of its horizontal and vertical neighbors 0
81, 4158, 515162, 144087952, 96890744524, 145542216126349, 555164681243665142 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A205246
LINKS
EXAMPLE
Some solutions for n=4
..2..0..2..1..0....1..0..0..2..0....0..1..2..1..0....2..1..2..2..0
..0..0..1..0..2....0..2..0..2..1....1..1..1..0..1....0..0..2..0..2
..0..2..2..1..2....1..2..0..0..0....0..1..1..1..2....1..1..2..1..2
..0..0..0..1..2....1..2..2..1..2....2..2..1..1..0....0..1..2..0..1
..1..1..0..1..0....1..1..0..1..2....2..1..2..0..0....0..1..0..1..2
CROSSREFS
Sequence in context: A237100 A245665 A016888 * A006312 A183962 A174698
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 24 2012
STATUS
approved

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Last modified May 28 01:34 EDT 2024. Contains 372900 sequences. (Running on oeis4.)