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A186017 1/8192 the number of (n+2)X9 0..3 arrays with no 3X3 subblock trace equal to any horizontal or vertical neighbor 3X3 subblock trace 0
894236244300, 47395262542477394, 2734847204224388546080, 157181851464796372886688987, 8989089860728323984726287971908, 514793257893476138400848117467563609 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A186019

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for 4X9

..2..0..2..0..2..0..0..0..0....2..0..2..0..2..2..3..1..2

..0..0..0..0..0..0..0..3..0....0..0..0..0..0..0..0..3..2

..0..0..0..0..0..0..0..0..3....0..0..0..0..0..0..0..2..2

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

CROSSREFS

Sequence in context: A233487 A297354 A172798 * A015433 A234195 A297356

Adjacent sequences:  A186014 A186015 A186016 * A186018 A186019 A186020

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 10 2011

STATUS

approved

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Last modified April 8 08:54 EDT 2020. Contains 333313 sequences. (Running on oeis4.)