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A186960
1/729 the number of (n+2)X9 0..2 arrays with each 3X3 subblock trace equal to some horizontal or vertical neighbor 3X3 subblock trace
0
40300479, 85776954369, 81727735220193, 96133158385481199, 108124495560461502429
OFFSET
1,1
COMMENTS
Column 7 of A186962
EXAMPLE
Some solutions for 4X9
..0..0..0..0..2..1..1..1..0....0..0..0..0..2..2..1..0..2
..0..0..0..0..0..2..1..1..2....0..0..0..0..0..1..0..0..2
..0..0..0..0..0..0..0..2..2....0..0..0..0..0..0..1..2..2
..0..0..0..0..0..0..0..1..0....0..0..0..0..0..0..0..1..1
CROSSREFS
Sequence in context: A307477 A218390 A186617 * A186571 A186572 A016929
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 01 2011
STATUS
approved