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A253162 Number of (n+1)X(4+1) 0..2 arrays with every 2X2 subblock sum differing from its neighbors horizontally, vertically and nw-se diagonally 1
26784, 443362, 7252320, 135741428, 2461955138, 44789509812, 808045500430, 14674315377606, 265844130932752, 4822273171428216, 87389675007459160, 1584487801002237370, 28722425603939593796, 520728445103764345118 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A253164
LINKS
EXAMPLE
Some solutions for n=1
..1..1..2..0..1....1..1..0..1..0....2..0..0..1..2....2..1..2..1..2
..2..2..2..1..2....1..0..0..1..2....0..0..1..2..1....2..2..0..1..1
CROSSREFS
Sequence in context: A251303 A196937 A253292 * A185774 A234158 A093180
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 28 2014
STATUS
approved

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Last modified July 14 04:38 EDT 2024. Contains 374291 sequences. (Running on oeis4.)