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A186140 Number of (n+1)X9 0..2 arrays with no 2X2 subblock trace equal to any horizontal or vertical neighbor 2X2 subblock trace 0
63009576, 58529531286, 58311925687818, 58096554299749404, 58456633907530057662, 58923376595033869477548, 59477821878604876659005166, 60068131623385389414240300432 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 8 of A186141

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for 3X9

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

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

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

CROSSREFS

Sequence in context: A157855 A017539 A227150 * A172575 A172583 A172683

Adjacent sequences:  A186137 A186138 A186139 * A186141 A186142 A186143

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 13 2011

STATUS

approved

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Last modified September 22 02:38 EDT 2021. Contains 347605 sequences. (Running on oeis4.)