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A201886
Number of zero-sum nX3 -2..2 arrays with every element equal to at least one horizontal or vertical neighbor.
1
1, 63, 765, 26003, 559115, 16513425, 435630965, 12576072219, 355197660509, 10318921933459, 299385686951737, 8776646594694357, 257891661687979323, 7614010950576116449, 225337048658653360699, 6687122593012508859001
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OFFSET
1,2
COMMENTS
Column 3 of
A201888
LINKS
R. H. Hardin,
Table of n, a(n) for n = 1..32
EXAMPLE
Some solutions for n=4
..2.-2.-1....2..2.-2...-1.-1.-1....1..1.-1....1..2..0....1.-2.-2....2.-1..2
..2.-2.-1...-1.-1.-2....2..0..0...-1..0.-1....1..2..0....1..1.-2....2.-1..2
.-1..0..0...-1..1..1....2..2..0...-1..0..2...-2.-2..0....1..0..1...-2.-1..0
.-1..2..2...-1..1..1...-1.-1.-1...-1.-1..2...-1.-1..0....0..0..1...-2.-1..0
CROSSREFS
Sequence in context:
A024004
A284927
A321545
*
A232794
A091027
A112494
Adjacent sequences:
A201883
A201884
A201885
*
A201887
A201888
A201889
KEYWORD
nonn
AUTHOR
R. H. Hardin
, Dec 06 2011
STATUS
approved
