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A186953 1/729 the number of (n+2)X(n+2) 0..2 arrays with each 3X3 subblock trace equal to some horizontal or vertical neighbor 3X3 subblock trace 0
0, 3783, 5903759, 47796308777, 1557834542977401, 226578401020498502579 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A186962

LINKS

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

EXAMPLE

Some solutions for 4X4

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

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

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

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

CROSSREFS

Sequence in context: A080953 A178193 A135200 * A107539 A046837 A109183

Adjacent sequences:  A186950 A186951 A186952 * A186954 A186955 A186956

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 01 2011

STATUS

approved

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Last modified May 22 00:16 EDT 2013. Contains 225508 sequences.