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A183815 1/81 the number of (n+1)X5 0..2 arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor 0
512, 65640, 8231592, 1042063656, 131467169720, 16607782066704, 2096961683069192, 264820293988996048, 33441129238755694072, 4223013161022170839808, 533285078101618075961512 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A183819

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions with upper left block zero for 3X5

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

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

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

CROSSREFS

Sequence in context: A035753 A107549 A186797 * A013701 A187461 A291461

Adjacent sequences:  A183812 A183813 A183814 * A183816 A183817 A183818

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 07 2011

STATUS

approved

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Last modified October 19 13:01 EDT 2019. Contains 328222 sequences. (Running on oeis4.)