login
A201957
Number of zero-sum nX4 -3..3 arrays with every element unequal to at most two horizontal and vertical neighbors
0
231, 17903, 303955, 9654533, 300895245, 10356370455, 360008261031
OFFSET
1,1
COMMENTS
Column 4 of A201958
EXAMPLE
Some solutions for n=2
.-1.-2.-2..3....2..1.-3.-3...-3.-3..2..2...-3..0..0..0....3..0.-2.-1
.-2.-2..3..3....3..1..1.-2....1.-3..2..2....0..3..3.-3...-1..0.-2..3
CROSSREFS
Sequence in context: A152102 A183663 A362429 * A152500 A066370 A139412
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 06 2011
STATUS
approved