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A185887 1/729 the number of (n+2)X7 0..2 arrays with no 3X3 subblock trace equal to any horizontal or vertical neighbor 3X3 subblock trace 1
6195480, 3246601822, 1859643383374, 1060306245936410, 601942558514445972, 341943649302595064930, 194280290689274140633844, 110380142237960121367785334, 62713144775703640933821912808 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A185891

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..39

EXAMPLE

Some solutions for 4X7

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

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

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

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

CROSSREFS

Sequence in context: A254592 A254360 A224640 * A306872 A186838 A204654

Adjacent sequences:  A185884 A185885 A185886 * A185888 A185889 A185890

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 05 2011

STATUS

approved

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Last modified May 18 18:18 EDT 2022. Contains 353823 sequences. (Running on oeis4.)