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A253160 Number of (n+1) X (2+1) 0..2 arrays with every 2 X 2 subblock sum differing from its neighbors horizontally, vertically and nw-se diagonally. 1
558, 5136, 46752, 443362, 4189216, 39478862, 371551030, 3500351616, 32968666098, 310607972526, 2925948121986, 27562007609152, 259623715582126, 2445694348190100, 23038546105524370, 217021887885861286 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 2 of A253164.
LINKS
EXAMPLE
Some solutions for n=3
..1..1..1....1..1..2....1..1..0....2..1..2....2..0..1....0..2..0....1..0..2
..1..0..0....0..2..2....2..2..0....1..1..0....1..2..1....0..0..1....1..2..1
..2..1..0....2..1..1....1..2..1....2..2..0....1..0..0....0..1..2....1..1..2
..2..2..0....2..2..0....2..0..1....0..0..0....1..1..1....2..0..2....1..0..1
CROSSREFS
Cf. A253164.
Sequence in context: A352350 A253290 A206123 * A253478 A253483 A185772
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 28 2014
STATUS
approved

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Last modified July 14 13:51 EDT 2024. Contains 374318 sequences. (Running on oeis4.)