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A186957
1/729 the number of (n+2)X6 0..2 arrays with each 3X3 subblock trace equal to some horizontal or vertical neighbor 3X3 subblock trace
1
19881, 3277141, 373049827, 47796308777, 6014794685157, 760608010557461, 96133158385481199, 12152638841787524045, 1536155109102267515515, 194180664943334156035447, 24545745720495840084573061
OFFSET
1,1
COMMENTS
Column 4 of A186962
LINKS
EXAMPLE
Some solutions for 4X6
..0..2..2..2..2..2....0..0..0..1..2..1....0..2..2..0..1..1....0..2..2..1..2..0
..0..0..0..1..1..0....0..0..0..1..0..1....0..0..0..0..0..1....0..0..0..0..0..1
..0..0..0..1..0..0....0..0..0..1..0..0....0..0..0..0..0..2....0..0..0..0..0..0
..0..0..0..1..0..2....0..0..0..0..2..2....0..0..0..2..1..1....0..0..0..0..2..1
CROSSREFS
Sequence in context: A194197 A250703 A256653 * A236907 A263298 A237564
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 01 2011
STATUS
approved