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A204866 Number of (n+2)X9 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly two different ways, and new values 0..1 introduced in row major order 1
283877, 2660367, 28334280, 309173896, 3572132537, 40833480416, 463699765823, 5337233301716, 61245366854871, 699327395092621, 8041377023804442, 92258561040986700, 1056397619905286761, 12133997044683483280 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A204867

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..181

EXAMPLE

Some solutions for n=3

..0..1..1..1..1..0..1..0..0....0..0..0..0..0..0..0..1..0

..0..1..1..0..0..1..1..1..0....0..1..1..0..1..0..1..0..0

..0..0..0..0..0..0..1..0..1....1..1..1..1..1..1..1..1..0

..1..1..1..1..0..1..0..0..0....0..0..0..0..0..0..0..0..0

..1..0..1..1..1..1..1..0..1....1..1..0..1..1..0..1..0..0

CROSSREFS

Sequence in context: A321055 A185886 A235827 * A236504 A214357 A096519

Adjacent sequences:  A204863 A204864 A204865 * A204867 A204868 A204869

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 20 2012

STATUS

approved

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Last modified June 18 19:04 EDT 2021. Contains 345120 sequences. (Running on oeis4.)