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A184375 1/3 the number of (n+1)X9 0..2 arrays with every 2X2 subblock having at least two equal elements connected horizontally or vertically 1
22064643, 90163722073, 360402692568245, 1444622701339019869, 5788675585887326994869, 23196517518911246631354055, 92953139774330929595592449437, 372482322079037724494019844619359 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 8 of A184376

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..25

EXAMPLE

Some solutions for 3X9 with a(1,1)=0

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

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

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

CROSSREFS

Sequence in context: A118860 A186595 A210076 * A183799 A205096 A183969

Adjacent sequences: A184372 A184373 A184374 * A184376 A184377 A184378

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 12 2011

STATUS

approved

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Last modified February 5 18:24 EST 2023. Contains 360087 sequences. (Running on oeis4.)